what is the kreb cycle?
Answer:
The citric acid cycle – also known as the TCA cycle or the Krebs cycle – is a series of chemical reactions used by all aerobic organisms to release stored energy through the oxidation of acetyl-CoA derived from carbohydrates, fats, and proteins.
Answer and Explanation:
I believe the Krebs cycle is the pathway of oxidation, glucose, fats, and amino acids..
I could be wrong..
This list of terms BEST describes ?
A) hypothesis
B) law
C) Theory
D) variable
Answer:
the answer is
Explanation:
hypothesis
What is the structure inside of the nucleus called and the name of the phase of the
picture below?
a. chromatid and interphase
b. chromosome and prophase
C. chromatin and interphase
d. centromere and mitosis
you haven't added a picture
Explanation:
But if you can describe the picture I can answer it
The nucleus is the major and the central organ of the cell. The structure inside of the nucleus is chromatin and the phase is interphase.
What is chromatin and interphase?Chromatin is a complex structure present only in the eukaryotic cells that are composed of protein and DNA. It is required for the packaging of the long DNA threads into a compact and dense form.
Chromatin makes up the chromosome and is the packaging element of the genetic material. The basic and smallest unit of the chromatin is the nucleosome.
Interphase is one of the cell cycle periods that contain the non-dividing phase. The G1, S and the G2 phase of the cell cycle are part of the interphases.
In this phase, the cell undergoes the process of replication or duplication and cell growth. Not the actual division of the cell occurs instead it prepares the cell for the division.
Therefore, option c. interphase and chromatin are the phases and the structures present inside the nucleus.
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Which cell structure plays a direct role in the release of chemicals from the cell?
Answer:
The correct answer is - the cell membrane.
Explanation:
When a human cell gets an external stimulus it triggers the production of the specific compound or chemical release which is packed in vesicles from the endoplasmic reticulum and Golgi apparatus to the cell membrane. The cell membrane is the cell organelle that allows or prohibits the entry or exit of any substance.
Chemical release or secretion also depends on the cell membrane and it allows the secretion of chemicals and plays an important role in the secretion of chemical, hormones, or any substance.
Cell membrane is an structure that plays a direct role in the release of chemicals from the cell.
The cell membrane is the wall that cells have, allowing them to remain independent from the external environment.
The membrane has receptors, which are molecules or sets of molecules, capable of recognizing and responding to signals from the extracellular medium, carrying specific information.
When these signals reach the plasma membrane, internal signals are triggered in the cell, both activating and inhibiting different cellular processes and the release of chemicals.
As an example of these external signals we can cite the release of chemicals such as hormones, for example insulin, which increases the synthesis of glycogen.
Therefore, we can conclude that cell membrane is an structure that plays a direct role in the release of chemicals from the cell.
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1 p 1. Any change in the sequence of DNA is... O transgenic shift O Single Genotype O Monohybrid Trait O Mutation bOther:
Answer:
A gene is a stretch of DNA that helps to control the development and function of all organs and working systems in the body.
Genes are passed from parent to offspring; the combination of these genes affects all aspects of the human body, from eye and hair color to how well the liver can process toxins.
Which of the following is not a chemical reaction that decomposes rock
O oxidation
O hydrolysis
O carbonation
O replacement
Answer:
replacement
Explanation:
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Which of the following expresses why water is so important to living organisms?
It assists organisms in obtaining certain dissolvable substances.
o
It assists organisms in remaining disease free.
о
It assists organisms in releasing carbon dioxide.
It assists organisms in breathing in oxygen.
Answer:
It assists organisms in obtaining certain dissolvable substances.
Organelles within a cell interact as a system to maintain homeostasis. The destruction of which of the following organelles would cause the MOST damage to the cytoplasm of a cell? А. ribosome b. chloroplast c. cell membrane D. Golgi apparatus
Answer:
cell membrane
Explanation:
cuz
The destruction of the organelle known as cell membrane would cause the
most damage to the cytoplasm of a cell.
The cell membrane is a covering in cells which help to protect the
cytoplasm .The cytoplasm contains most of the organelles such as
lysosomes, ribosomes etc.
The cell membrane also controls the substances which enters and leaves
the cell and destroying it will lead to attack on the cells from other
organisms or a higher concentration which may lead to shrinking and death.
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Choose the true statement about prokaryotic and eukaryotic DNA replication. View Available Hint(s) Choose the true statement about prokaryotic and eukaryotic DNA replication. Eukaryotic DNA replication involves less protein factors than does prokaryotic DNA replication. Eukaryotic DNA replication begins at multiple origins of replication, while prokaryotic DNA replication begins at a single origin of replication. Prokaryotic genomes take longer to replicate than eukaryotic genomes. Prokaryotic DNA polymerases replicate DNA 5' to 3', while eukaryotic DNA polymerases replicate DNA 3' to 5'.
Answer:
The correct answer is - Eukaryotic DNA replication begins at multiple origins of replication, while prokaryotic DNA replication begins at a single origin of replication.
Explanation:
There are several differences in the prokaryotic and eukaryotic DNA replication as it takes place in the cytoplasm in prokaryotes whereas it occurs in the nucleus in the eukaryotes. The other difference is that it is a continuous process in prokaryotes but it occurs during the S phase only in eukaryotes.
In prokaryotes, the DNA replication begins at a single origin of replication in both directions and in eukaryotes, DNA replication starts at multiple origins of replication.
5 The theory of plate tectonics was, at first, rejected by most scientists. Now most geologists accept that tectonic plates exist and that these tectonic plates can and do move. What is responsible for the change in how scientists think about plate tectonics? A New evidence was discovered that made scientists revise their ideas. B. Tectonic plates have begun to move faster and faster over time. C There are more people studying science now than in the past. D Scientists can now travel underneath the plates and observe their motion.
Tectonic plates have begun to move faster and faster, leading to a change in scientists' thinking about plate tectonics. Hence the correct option is (B).
What is Tectonic Plates?
Tectonic plates are also known as lithospheric plates. It is a massive, irregularly shaped slab of solid rock that is composed of both continental and oceanic lithosphere. The size of the plates varies greatly from a few hundred to thousands of kilometres.
The plates are the largest in the Pacific and Antarctic Oceans. Its thickness also varies greatly, ranging from less than 15 km for young oceanic lithosphere to about 200 km or more for ancient continental lithosphere.
Earth's rigid surface known as the lithosphere acts as a skin that rests and slides over a semi-molten layer of rock called the asthenosphere. It can break into many different plates because of differences in the density of rock and differences in subsurface heating between one region and the next.
Thus, Tectonic plates have begun to move faster and faster, leading to a change in scientists' thinking about plate tectonics. Hence the correct option is (B).
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Based on everything you’ve read, which symptoms could indicate an eating disorder that might not be detectable by measuring BMI? What subjective and objective observations could you use to help detect other eating disorders in a clinical setting like the one described in this scenario?
Answer:
Detection requires awareness of risk factors for, and symptoms and signs of, anorexia nervosa (participation in activities valuing thinness, family history of an eating disorder, amenorrhea, lanugo hair) and bulimia nervosa (unsuccessful attempts at weight loss, history of childhood sexual abuse, family history of depression, erosion of tooth enamel from vomiting, parotid gland swelling, and gastroesophageal reflux). Providers must also remain alert for disordered eating in female athletes (the female athlete triad) and disordered eating in diabetics. Treatment requires a multidisciplinary team including a primary care practitioner, nutritionist, and mental health professional. The role of the primary care practitioner is to help determine the need for hospitalization and to manage medical complications (arrhythmias, refeeding syndrome, osteoporosis, and electrolyte abnormalities such as hypokalemia). Explanation:
1. Which weather variable can be determined by using a psychrometer?
Answer:
atmospheric humidity.
Explanation:
used to measure the amount of water vapor in air, in soil, or in confined spaces. Humidity measurement instruments usually rely on measurements of some other quantities such as temperature, pressure, mass, a mechanical or electrical change in a substance as moisture is absorbed.
8. What factor contributes the most to the overall health and sustainability of an
ecosystem?
What is the equation for calculating the change in water potential? In other words, this equation allows you to determine which way the water will move in response to two different concentrations.
Answer:
The correct answer is - Ψ = ΨS + ΨP.
Explanation:
The movement of the water in a solution where is two different concentrations present can be determined by measuring the water potential (Ψ).
Water potential (Ψ) can be determined by the equation that depends on these two factors osmotic potential represent by ΨS and pressure potential represent by ΨP.
Ψ = ΨS + ΨP.
6. Which of the following does NOT possess a double circulation pathway?
A Car
C. milkfish
D. parrot
B. dog
Answer:
The car does not possess a double circulation pathway
Homework is due in 2 hours and i need help on this last question!
Which of the following could help reduce waste buildup in heavily populated areas?
A.
using washable dishes rather than disposable plates and utensils
B.
packing your lunch in a reusable bag instead of a paper bag
C.
recycling paper, plastics, metals, and glass
D.
all of these
Answer:
D
Explanation:
all.of the above because in heavy populated areas there is more waste so you would need tp do as much as pkssible to reduce the build up
What are some Non-examples of a Fossil record?
Answer:
Explanation:
A fossil record is a group of fossils which has been analyzed and arranged chronologically and in taxonomic order. Fossils are created when organisms die, are incased in dirt and rock, and are slowly replaced by minerals over time. What is left is a mineral impression of an animal which once existed. Many fields and specialties are utilized to categorize and arrange these fossils, including comparative anatomy, radiometric dating, and DNA analysis. Using the data from the fossil record, scientist try to recreate phylogenies, or trees describing the relationships between animals, both alive and extinct. The fossil record helps inform how different groups of animals are related through evolution.
Answer:
Fossils are the geologically altered remains of a once-living organism and/or its behaviour. There are two main types: body fossils represent all or part of the organism’s body, and trace fossils show evidence of the organism’s behaviour. The study of fossils is called paleontology, from the Greek meaning ‘ancient (paleo-) being (onto-) study (-logy)’. Scientists who study fossils are called paleontologists. Fossils are of particular interest to geologists as they can help determine the age of a particular rock compared to other rocks, or identify the environment in which the rock was formed.
What might account for the amplitude difference of waves recorded from a subject tested alone, in a darkened room and subjects tested in a lab full of students? Explain for each of these experimental conditions.
Answer:
Amplitude of waves recorded in a darkened room will be more accurate than Amplitudes recorded in a lab full of students because there is more concentration and less noise while recording the amplitude in a darkened room than in a lab full of students
Explanation:
Amplitude of waves recorded in a darkened room will be more accurate than Amplitudes recorded in a lab full of students because there is more concentration and less noise while recording the amplitude in a darkened room than in a lab full of students ,
identify the organism that is being neither harmed or helped in Finding Nemo
Answer:
Some have lifelong relationships with other organisms, called symbiotic relationships. There are three different types of symbiotic relationships: mutualism, commensalism, and parasitism. Commensalism: only one species benefits while the other is neither helped nor harmed
Naomi’s allowance is $2.00 per week. If she convinces her parents to double her allowance each week for two months, what will her weekly allowance be at the end of the second month (week 8)?
Answer:
512
Explanation:
2x2 4x2 8x2 16x2 exc, exc
Carbon dioxide from living things is also returned to teh atmosphere through processes of ____ of dead tissue
OA decomposition
OB combustion
OC photosynthesis
OD respiration
Answer:
carbon dioxide from living beings is also returned to the atmosphere through processes of respiration of dead tissue.
The answer is (c) respiration
Carbon dioxide from living things is also returned to the atmosphere through processes of decomposition of dead tissue.
What is Decomposition?This is the process in which dead organisms are broken down into simpler substances and releases compounds such as carbon dioxide, water etc.
Decomposition is however the most appropriate choice which is why option A was chosen.
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List the four adaptation seen in Australopithecus afarensis fossils that enable biedalism.
Answer:
hope this helps
Explanation:
Bipedal modifications include "stacking" the bulk of the body weight on a small region near the center of gravity (i.e., the head is above the chest, which is above the pelvis, which is over the knees, which is above the feet).
What is most likely to happen if oxygen is not able to enter a cell
Answer:
When Oxygen is not available, the cell is forced to produce energy (=ATP) through ANAEROBIC processes, that produce much less energy (about 15 times less), than AEROBIC processes. Oxygen is essential for the functioning of the electron transport chain.
Explanation:
what is the disciplines?
Discipline Means to Teach — Not to Punish or Control
Through discipline. ... Discipline shares the root with the word “disciple.” It means to teach or to guide. It does not mean to control or punish.
28. What substance is a liquid at 4000 °C?
carbon
phosphorus
xenon
arsenic
nitrogen
Answer:
its carbon............
Answer:
Against the wall and the other side and rear bumpers to be a great...
using what have you learnt about the effect of concentration gradient and surface area to volume ratio, explain the adaptations of a leaf for photosynthesis
Answer:
thanks
Explanation:
Leaves are adapted for photosynthesis and gaseous exchange.
They are adapted for photosynthesis by having a large surface area, and contain openings, called stomata to allow carbon dioxide into the leaf and oxygen out. Although these design features are good for photosynthesis, they can result in the leaf losing a lot of water. The cells inside the leaf have water on their surface. Some of this water evaporates, and the water vapour can then escape from inside the leaf.
When water evaporates from the leaves, resulting in more water being drawn up from the roots, it is called transpiration.
To reduce water loss the leaf is coated in a waxy cuticle to stop the water vapour escaping through the epidermis. Leaves usually have fewer stomata on their top surface to reduce this water loss.
Leaves enable photosynthesis to occur. Photosynthesis is the process by which leaves absorb light and carbon dioxide to produce glucose (food) for plants to grow. Leaves are adapted to perform their function, eg they have a large surface area to absorb sunlight.
Plants have two different types of 'transport' tissue, xylem and phloem. These specialised tissues move substances in and around the plant.
Term
1.
2.
3.
countrationer
5.
6.
7.
8.
9.
10.
11.
12.
Definition
high to low movement of molecules; uses transport protein; no energy required
a solution that has the same concentration of solute as the cells it surrounds
water-loving
a difference in the concentration of molecules from one location to another
structure that identifies the cell
having less solute molecules than the cytoplasm of a cell
allows certain molecules to pass through; keeps some molecules out
the amount of molecules in a specified area
use of vesicles to move large molecules out of the cell
the substance that is dissolved in a solution
movement of molecules from a low to high concentration; uses transport protein;
requires energy
movement of water from an area of high concentration to an area of low
concentration through a cell membrane; no energy required
mixture created when one substance is dissolved in another
movement of molecules from an area of high concentration to an area of low
concentration; no energy required
use of vesicles to move large molecules into the cell
a solution that has a higher concentration of solute molecules than the cytoplasm
of the cell it surrounds; will cause cells to shrink
phospholipid and protein covering of every cell that controls what goes into and
out of each cell
the liquid that dissolves the solute in a solution
water-fearing
a solution that has a lower concentration of solute molecules than the cytoplasm
of the cell it surrounds; will cause cells to swell and burst
a structure that helps to move molecules across the cell membrane
current model that describes membrane structure in which a phospholipid sea is
embedded with a wide variety (mosaic) of protein molecules
13
14.
A diffusion
15.
16.
17
18.
19.
20.
21.
22.
Answer:
structure that identifies the cell / recognizes stuff around the cell. hypotonic. having less solute molecules than cytoplasm of a cell / having a lower ... movement of molecules from low to high; uses transport protein; requires energy ... movement of molecules from high concentration to low concentration; no energy required.
Explanation:
What are histones, and how are they arranged in nucleosomes? Drag the terms on the left to the appropriate blanks on the right to complete the sentences. Not all terms will be used.
a. lysine and arginine
b. histidine
c. five
d. four
e. eight
f. glycine and proline
g. two
h. one
Histones include_______ main classes of relatively small basic proteins containing relatively large amounts of_______ . Nucleosomes are made of________ each of_______ types of histones.
Answer:
1) c. five
2) a. lysine and arginine
3) g. two
4) d. four
Explanation:
A nucleotide can be defined as an organic molecule which forms the building block of nucleic acid such as deoxyribonucleic acid (DNA) and ribonucleic acid (RNA).
Basically, nucleotide comprises of the following parts;
1. Nitrogenous base: this includes adenine (A), thymine (T), guanine (G), and cytosine (C) which are mainly found in the DNA while adenine (A), guanine (G), uracil (U) and cytosine (C) are found in the RNA.
2. A phosphate group.
3. A penrose sugar: it is either deoxyribose in DNA or ribose in RNA.
The two parts or chemical components of a nucleotide which do not change throughout the structure of DNA are;
I. Five-Carbon Sugar also known as deoxyribose and it has hydrogen on its second carbon.
II. Phosphate: this is the structural backbone that provides support to DNA.
Histones are a group of highly basic proteins that are mainly associated with deoxyribonucleic acid (DNA) in the nucleus of a living organism and then condense it to chromatin.
Histones include five main classes of relatively small basic proteins containing relatively large amounts of lysine and arginine. Nucleosomes are made of two each of four types of histones.
Please help! Cells inside the body work to keep the dog's temperature stable. True or False?
Answer:
False!
Explanation:
Regulation of the temperature in any body is mostly done by the nervous system. But if a dog wants to maintain homeostasis they will pant as a way to cool off. This physical behavior is their way for regulating their internal temperature, which keeps them from overheating
how do the rates of photosynthesis change with the physical environment?
Answer:
Without enough light, a plant cannot photosynthesis very quickly - even if there is plenty of water and carbon dioxide and a suitable temperature. Increasing the light intensity increases the rate of photosynthesis, until some other factor - a limiting factor - becomes in short supply.
Explanation: