Nucleotides are defined as the building blocks of DNA and RNA. These are the genetic material found in every living cell. The nucleotides are made up of sugar, a phosphate group, and nitrogenous bases.
The molecules like DNA and RNA have some of the building blocks same. The pentose sugar and nitrogenous bases. The molecule when composed of sugar molecules and nitrogenous bases are termed as a nucleoside.
The addition of the phosphate group to a nucleoside forms the nucleotide.
RNA is composed of nitrogenous bases (adenine, cytosine, uracil, and guanaine), pentose sugar (ribose), and a phosphate group.
DNA is composed of nitrogenous bases (adenine, cytosine, thymine, and guanaine), pentose sugar (deoxyribose), and a phosphate group.
Thus, DNA and RNA are nucleosides consisting of nitrogenous bases (purines and pyrimidines) and sugar groups.
Therefore, the correct answer is the molecule can be DNA or RNA.
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Someone please help me on this
the breakup of glucose into two pyruvate molecules. the maltose lands on the active site of the enzyme. the enzyme has to have a specific in order for the maltose to connect there.
6g of calcium chloride must be heated in
order to dissolve it in a test tube of water.
After an experiment, as a test tube of salt
solution cools, salt forms at the bottom of
the test tube
As soda is heated, the amount of Carbon
dioxide dissolved in it decreases.
Calcium Chloride is more soluble when it
is heated
It take more time stirring to dissolve salt
in 100ml than it does in 200mL of water.
More salt can be dissolved in a 250ml
beaker of water than in a 100ml beaker of
water
More sugar can be dissolved in Hot tea
than iced tea
The solubility of Sodium Chloride is
almost identical at 15, 20, 25 and 30°C
Supports conclusion
Brings into question this conclusion
Neutral observation
Answer:
See explanation
Explanation:
I will try to explain each point mentioned to the best of my ability.
The dissolution of calcium chloride in water is endothermic hence more solute dissolves as the temperature increases. When the solution cools, the solubility of the solid also decreases with decreasing temperature hence the solid reappears.
When soda is heated, carbon dioxide gas is evolved thereby decreasing the amount of dissolved carbon dioxide.
Let me state that increase in volume of solvent increases the amount of solute that can dissolve in it. This is why 250ml volume of solvent can dissolve more solute than 100ml of solvent.
Also, temperature is an important factor when discussing the solubility of a solute. This is why the temperature at which a certain value of solubility is quoted must be indicated. For solids, solubility increases with increase in temperature.
Lastly, the solubility of sodium chloride is independent of temperature. This is clearly seen by plotting a solubility curve.
mention the ways by which living beings adapt?
What do seals and birds have in common in the food web?
Answer:
Well.
Explanation:
Well, for the most part, both seals and birds eat fish.
And, both seals and birds get eaten by sharks.
1
Some plants can be grown in water using the technique of hydroponics. The roots are in water and
supplied with the ions that they need at the concentrations that support maximum growth. Some
ions can be absorbed both by diffusion and by active transport.
(a) (i) State two features of diffusion that do not apply to active transport.
Answer:
# Diffusion is a down hill process.(flow is from higher concentration to lower concentration)
# It does not require energy.
but,
# Active transport is a uphill process.(flow is from lower concentration to higher concentration)
# It requires energy.
Two features of diffusion that do not apply to active transport are:
Diffusion is a passive process that does not require energy input, while active transport requires the expenditure of energy in the form of ATP.Diffusion occurs down a concentration gradient, from an area of high concentration to an area of low concentration, while active transport can move ions against their concentration gradient, from an area of low concentration to an area of high concentration.What is Diffusion?Diffusion is a process by which molecules move from an area of high concentration to an area of low concentration, until they reach a state of equilibrium where there is no further net movement of molecules.
This occurs because molecules are in constant random motion, and they will naturally move from areas where they are more concentrated to areas where they are less concentrated. This process does not require energy input, and it will continue until the concentration of molecules is the same throughout the system.
Active transport, on the other hand, is a process by which molecules are moved across a membrane against their concentration gradient, from an area of low concentration to an area of high concentration.
This process requires energy in the form of ATP, which is used to pump molecules or ions against their concentration gradient. Active transport is able to move molecules or ions against their concentration gradient because it uses energy to change the shape of transport proteins in the membrane, allowing them to move molecules against their concentration gradient.
Therefore, two key features of diffusion that do not apply to active transport are that diffusion is a passive process that does not require energy input, while active transport requires energy input in the form of ATP.
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You are looking through a light microscope with a 10x eyepiece trying to determine what type of cells you are seeing. You can only see individual cells with 100x total magnification. What type of cell is it and how much detail would you expect to see?
A=Prokaryotic cell, very little detail
B=Prokaryotic cell, much detail
C=Eukaryotic cell, very little detail
D=Eukaryotic cell, much detail
Answer:
Either A or B
Explanation:
Prokaryotic cells are unicellular.
At 100x total magnification, we would see eukaryotic cells with very little detail. So the correct option is C.
What is magnification?The ratio of the size of the image of an object to the actual size of an object in a plane perpendicular to the optical axis is referred to as magnification.
If the value of the linear magnification is negative, the image formed will be invested. If the value of the linear magnification is positive, the image will be erect.
The magnification of a microscope is calculated as the magnifying power of the objective lens and the eyepiece lens. This is called the total magnification of the microscope.
Now, the total magnification is 100x, and the magnification of the eyepiece lens of 10x.
Let the magnification of the objective lens be y.
10x × y = 100x
y = 100x / 10x
y = 10x
So, an objective lens at 10x is used to observe the eukaryotic cell with very little detail.
Therefore, the correct option is C.
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How does each organism’s niche and habitat play a part in each type of symbiosis?
Answer:
The answer is B
Explanation:
I know it's B because I did this question before.
hope this helps :)
What are the two leading causes of CO2 being in the atmosphere?
True or false:
This is for science and I only have one more question but it's getting me stuck: if you get this right I'll vote you brainiest!:)
If a gene sequence changes, the proteins associated with that gene could likewise
be affected. True/False
Answer:
True
Explanation:
Which phrase describes a landform?
a feature of the landscape
the shape of land in an area
a process that shaped Earth's surface
the difference in elevation between the highest and lowest points
Which phrase describes a landform
Answer:
A) a feature of the landscape
Explanation:
got it right on edge
A landform is the set of forms that stand out on a plane or surface, being a feature of the landscape.
What is a landform?It is an outstanding texture of a surface that has different variations, among the most characteristic reliefs of the earth's surface are mountains, plateaus and plains.
These textures are presented in the form of irregularities and unevenness within a terrestrial or aquatic ecosystem, which provides a feature in a given landscape.
Therefore, we can conclude that a landform is formed by everything that protrudes from a flat surface or that modifies it, that is, it is the set of irregularities or features of a landscape.
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one of your friends says that heart disease is mostly inherited from your parents and grandparents and you cant do anything about it. Another friend says that it is caused by environment factors that you can control. What do you think? Explain your answer.
Answer:
Well, it can be both.
Explanation:
So for the parents and grandparents, It can be a genetic thing. Where your previous family members have had it and have passed it down. And for the environment thing, well, somethings can cause heart diseases like a disease on a wild animal or a foreign plant or drug can make your heart get a disease.
plz help :,( will give brainliest TT_TT
For which gene or genes will the recessive trait be expressed in this individual?
The Q gene
The S gene
The T gene
The U gene
thank you <3
Answer:
t
Explanation:
its recessive
1. Angiosperms ensure the transfer of gametes through structures called _____________________.
What is a substrate?
a molecule that acts as a catalyst
a place on the enzyme where the reaction occurs
a place on the product where the enzyme fits
a reactant that is catalyzed by an enzyme
Answer:
D. a reactant that is catalyzed by an enzyme
Explanation:
A substrate is a reactant that is catalyzed by an enzyme. Therefore, the correct statement is option D.
What is a catalyst?A substrate is a reactant molecule that binds to the active site of an enzyme and the enzyme then chemically transforms the substrate through a series of catalytic reactions.
Enzymes are the catalysts that are used to increase the rate of biochemical reactions by lowering down the activation energy that is required for the reaction to occur. The substrate when binds to the active site of the enzyme, it forms an enzyme-substrate complex followed by its conversion into one or more products. When the product is formed, enzyme gets released from the product.
A catalyst is a substance which is used to lower down the activation energy required by the reaction, thereby, increasing the reaction rate to form a product.
Therefore, substrate is a reactant that is catalyzed by an enzyme.
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The force that stops a jet plane as it lands on the flight deck of an aircraft
carrier is provided by a series of arresting cables. These cables act like
extremely stiff rubber bands, stretching enough to keep from slowing the plane
down too suddenly. A Hornet jet with a mass of 1.3 x 10 kg lands with an
acceleration of -27.6 m/s squared. How large is the unbalanced force that the arresting
cables exert on the plane?
Answer:
358,800N
Explanation:
F(orce) = mass × a(cceleration)
Found it online while looking for the same question lol
Given the formula D=M/V, a substance with a Density of 50 gm/cc, with a Volume of 10 cc, has a Mass of ___________
A
500 cc
B
250 cc
C
500 gm
D
500 cc
Answer:
A
500 cc
Explanation:
D= M/V
50 =M/10
M =50×10
=500 cc.
Hope it helped.
Which of the following is a mixture?
A.Gold
B.Honey
C.Steel
D.Water
Answer:
c
Explanation:
cuse steel is an alloy which is a mixture of a metal and non metal
I need help please! This is a question on genetics!
Explanation:
first - red
second- both red and pink
third - both red and pink
Animals that uses simple diffusion respiration
Answer:
Flatworms and cnidarians
Explanation:
In simple organisms, such as cnidarians and flatworms, every cell in the body is close to the external environment. Their cells are kept moist so that gases diffuse quickly via direct diffusion. Flatworms are small, literally flat worms, which 'breathe' through diffusion across the outer membrane
Which organs are part of the excretory systems
Answer:Kidney
Explanation:
The Excretory system is responsible for the elimination of wastes produced by homeostasis. There are several parts of the body that are involved in this process, such as sweat glands, the liver, the lungs and the kidney system.
An organs Kidney, ureter, urinary bladder and urethra are part of the excretory systems.
What is excretory system?It is biological system.The Excretory system eliminate excess wastes material from the body of the organism.It help to maintain internal chemical homeostasis.It prevent body for damage.Kidney filter the blood and filtrate obtained is urine.This urine is passes through ureter to urinary bladder and expelled out the body.To learn more about organs here,
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2. True or False
Only people who wore glasses as children need glasses for reading as they get older.
Answer:
false
Explanation:
What is the term for the separation of genetic material of a cell into two daughter cells?
interphase
mitosis
cell cycle
cell division
Answer:
B; Mitosis.
Explanation:
Mitosis is a process of nuclear division in eukaryotic cells that occurs when a parent cell divides to produce two identical daughter cells. During cell division, mitosis refers specifically to the separation of the duplicated genetic material carried in the nucleus.
Answer: B. Mitiosis
Explanation: I got it in the k12 quiz final
PLS HELP NEED IT FAST
Answer:
sunlight is essential for normal growth of pine trees
Explanation:
I think becuase photosyinthiesis needs sunlight to be able for the trees to grow
i hope this helps
Which of the following is not a characteristic of enzymes?
F
they are proteins
G
they act as a catalyst
H
they react with a specific substrate
they are unaffected by changes in temperature
J
they are unaffected by changes in temperature
Answer:
they are unaffected by changes in temperature. t
Explanation:
that's the answer J. u kinda wrote it in two places.
Which one is correct tho?
Answer:
is c
Explanation:
Sedimentary rocks form because of all of the following EXCEPT
A. sediments becoming pressed or cemented together
b. crystals solidifying from magma
c. sediments forming from solution
d. water evaporating, leaving crystals behind
Answer:
a sediments becoming pressed or cemented together
Explanation:
Answer:
a
Explanation:
FORENSIC SCIENCE!! When analyzing a strand of hair, investigators would first try to collect DNA from which general location?
Inside of the hair strand
The medulla
The hair tip/point furthest from the scalp
The point closest to the scalp
Answer:
The correct answer is - The point closest to the scalp.
Explanation:
In order to analyze a strand of hair investigators need to collect the DNA. To analyze a strand of hair the DNA must be nuclear DNA which can be found at the root of the hair near the scalp as the point, hair attached to the scalp there are cells that can provide the nuclear DNA. Any other section or the part of the hair strand does not contain the nuclear DNA so analyze DNA would not be possible.
explain why an Organism genotype maybe homologous but never homologous recessive.
Answer:
The only way a phenotype or genotype can be recessive is if both alleles are recessive
Explanation:
i think
Answer:It helps an organism reproduce and therefore appears more often. And since dominant alleles sometimes are heterozygous, even if an organism with the dominant gene was able to reproduce, it could still produce a recessive offspring. So I would say that the gene that helps the organism reproduce would actually be the more prevalent trait
Explanation:
what are benefits of coal as a source of energy ?
Answer:
The most significant uses of coal are in electricity generation, steel production, cement manufacturing and as a liquid fuel. ... Steam coal - also known as thermal coal - is mainly used in power generation. Coking coal - also known as metallurgical coal - is mainly used in steel production.
The pictures below show a hot spring and a geyser.
image on the left is a hotspring, image on the right is a geyser
Which of these statements is correct about the hot spring and geyser shown in the pictures?
Both are formed when the groundwater erodes limestone.
Both are formed when the groundwater gets heated.
The hot spring is formed by the heating of groundwater and the geyser is formed by the erosion of limestone by groundwater.
The hot spring is formed by the erosion of limestone by groundwater and the geyser is formed by the heating of groundwater.
Answer:
Both are formed when the groundwater gets heated
Explanation:
This is correctamundo
"why?"- you ask
well because when groundwater gets all hot and worked up we get a result in the form of geysers and hotsprings!
Have a great day and wash your hands and STOP TOUCHING YOUR FACE!
jk haha- please don't be take this seriously good day to you all!
Answer:
B. Both are formed when the groundwater gets heated.
Explanation:
Hot springs and geysers are very similar when it comes to how they are formed. The obvious difference is that geysers force up jets of water, whilst hot springs flow water out on their own. They are both formed when the groundwater gets heated from molten rock(magma).
This is reliable because I took the same quiz and got the question right.