With respect to mammalian cell culture, which of the following statements is true? During the establishment of a cell line, senescence is the last stage of the cell's life. Rodent cells cultures undergo spontaneous transformation with similar frequency to human cell cultures. Media used for cell growth contain proteases and a divalent cation chelator to help cells adhere to the surface. Embryonic cell lines do not undergo senescence nor do they have a finite life span.
Answer:
Media used for cell growth contain proteases and a divalent cation chelator to help cells adhere to the surface.
Explanation:
Mammalian cell structure is the process where animals cells are grow in vitro in a flask or dish. The methods, equipments, reagents and supplies use in this type of culture prevent contamination and maintain cell culture purity. Protein enzymes like Serine protease breaks the cellular matrics interaction between the cells. In cell culture, the focal adhesions that are anchoring the cell to the culture dish is cut away. Most trypsin solutions for cell culture also contain EDTA which acts as a chelator for calcium. When calcium is remove from a solution, cadehrin that hold cells to each other break down and cells become separated from each other.
Which is one of the six fundamental elements that are found in living organisms?
Answer:
1: Carbon
2: Hydrogen
3: Nitrogen
4: Oxygen
5: Phosphorus
6: Sulfur
Explanation:
The six fundamental elements that are found in living organisms are carbon, hydrogen, nitrogen, oxygen, phosphorus, and sulfur.
Hope this helps.
Maja's family has a history of heart disease. What can she do to help lower her chance of having heart disease?
Four o'clock plants can have green leaves, white leaves, or variegated leaves (leaves with areas of white and areas of green). The white regions of the leaves lack functioning chloroplasts. The transmission of leaf color in four o'clock plants demonstrates organelle inheritance. In this problem, you will explore this inheritance pattern. Which of the following crosses between four o'clock plants could produce progeny plants with green leaves?
1. G variegated (female) x variegated (male)
2. G green (female) x white (male)
3. G white (female) x green (male)
4. G white (female) x variegated (male)
5. Gvariegated (female) x white (male)
Answer:
2. G green (female) x white (male)
Explanation:
The cross that could produce progeny plants with green leaves would be the cross between a green female and a white male.
Since the transmission of leaf color in the plant demonstrates organelle inheritance, the female controls which leaf color is inherited by the progeny. Organelles are generally located in the cytoplasm which is largely contributed by the female egg during fertilization. Hence, organelle inheritance are controlled by the female and that is why they are often referred to as maternal inheritance.
Therefore, a cross involving a green female and a white male would largely yield green progeny provided that the trait inheritance follows an organelle inheritance.
Which of the following can cause acid precipitation?
A. The use of solar panels
B. The use of Hydroelectricity
C. The use of coal
D. All of the above
Answer:
C. The use of coal
Explanation:
Which best describes the process of peer review ?
Answer:
Scientists examine each other's work often to make sure it is not biased or unreliable. this makes for a group effort and reliable information.NOT JUST SCIENCE
Many fields outside of science use peer review to ensure quality.
Explanations : Peer review is the process of peers in the field of the work review the work and give opinion of it
Both archaea and bacteria have a/n _______, but it is made of peptidoglycan in bacteria and pseudo peptidoglycan in archaea.
Answer: Cell Wall
Explanation: Both archaea and bacteria have a/n Cell Wall, but it is made of peptidoglycan in bacteria and pseudo peptidoglycan in archaea.
Antibiotics can be highly effective in treating bacterial infections, as long as the bacteria have not developed _______ to the antibiotics.
Bacteria or viruses can cause _______ diseases, which are increasing in occurrences, geographic area, or both.
Answer: Immunity
Explanation: Antibiotics can be highly effective in treating bacterial infections, as long as the bacteria have not developed immunity to the antibiotics.
What is the mean of the data set [3,2,2,12,6,5,14,4]?
A.2
B.4
C.6
D.7
Answer:
6
Explanation:
To find the mean of a data set, add all the values in the set together, and then divide the result by the number of values in the set.
3 + 2 + 2 + 12 + 6 + 5 + 14 + 4 = 48
There are 8 values in the data set.
48/8 = 6
So the mean of the data set is 6.
what part of the nervous system controls your internal organs
Answer:
autonomic nervous system
Explanation: that can control everything in our body
Answer:
The central nervous system (CNS) controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord.
HOPE IT HELPS :)
PLEASE MARK IT THE BRAINLIEST!
Which is a key component of the energy molecule ATP?
Answer:
The correct answer is phosphorous but occurs in the form of a phosphate
3 Question
Select the correct answer.
Which of these is a component of the atmosphere?
rock
oxygen
sediments
soil
Answer:
oxygen
Explanation:
Which of the following statements is correct regarding chromosomes?
A. Chromosomes are strands of DNA, tightly wrapped up, that are located in the nucleus.
B. Chromosomes are strands of RNA, tightly wrapped up, that are in the cytoplasm.
C. Chromosomes are strands of RNA, loosely wrapped up, that are located everywhere in the cell.
D. Chromosomes are strands of DNA, tightly wrapped up, that are located everywhere in the cell.
Answer:
A. Chromosomes are strands of DNA, tightly wrapped up, that are located in the nucleus.
Explanation:
Hope this helped and pls mark me brainliest
The statement that says "Chromosomes are strands of DNA, tightly wrapped up, that are located in the nucleus" is correct regarding chromosomes.
Chromosomes are the highly organized structures inside biological cells, made up of DNA and other proteins, and where most of an individual's genetic information resides.
Chromosomes have a double structure, composed of two structures parallel to each other and joined by a centromere, called chromatids.
In eukaryotic cells (with a defined nucleus), the chromosomes are elongated and found in the nucleus, while in prokaryotic cells, such as bacteria, these appear as circular rings closed in the nucleoid.
The chromosome allows the DNA information to be conserved and evenly distributed.
Therefore, we can conclude that chromosomes are condensed strands or rings of DNA and are located in the nucleus of cells when they are not dividing.
Learn more about chromosomes here: https://brainly.com/question/12463363
You are a pharmaceutical researcher trying to design a new drug for the treatment of cystic fibrosis. You are aware that an extracellular protein that is a chloride ion transporter is misfolded and never gets to the cell surface. You have a new undergraduate working with you. Explain which organelle is involved in this process and why the transporter protein is nonfunctional.
Answer:
Endoplasmic reticulum is the defective organelle in most CF.
Explanation:
This is because of mutation(deletion) in the proteins of these organelle. The CFTR protein -a transmembrane regulator get stucked inside the E.R, thus the CFTR chloride protein channel is blocked. Therefore the outflow of Cl and water out of the cell is obstructed.
Consequently, the mucus from blocked fluid flow, clogs the lungs, the fallopian tube, sweat duct, and other places.
This nutrient is cycled between living things and the soil. Plants absorb this nutrient from the soil and turn it into organic compounds through assimilation. Animals eats the plants and pass the nutrient through the food chain from one organism to another. When the animal dies, it decomposes and returns the nutrient back to the soil. The nutrient can also enter the soil through weathering and erosion.
Answer:
1. Phosphorus cycle
2. Carbon cycle
3. Nitrogen cycle
Explanation:
Answer:
1. Phosphorus
2. Carbon Cycle
3. Nitrogen Cycle
Explanation:
A patient is receiving an infusion of an IV medication. The IV bag contains 800 ml of the solution, which is infusing at 100 cc/hr. If the infusion started at 2 pm, when will it finish?
Answer: 10 pm
Explanation: 800 ml infusing at 100cc/hr would take 8hrs so 8 hrs from 2pm is 10pm
Poisons and salts are removed from the blood by the _____.
lungs
stomach
kidneys
skin
Answer:
Kidneys
Explanation:
The kidneys remove wastes and excess water in the body through the urine, as urine flows from the kidneys to the bladder through two thin tubes located on both sides of the bladder called the ureter, and the bladder stores urine, and each of the kidneys consists of about one million filtering units called the renal tubular unit contains Each renal tubular unit has a filter called the glomerulus and tubule, and the renal tubular unit operates through a two-step process:
glomerulus: filters blood.
Tubule: Returns the necessary substances to the blood and removes waste.
AnswEr:
Kidneys
Explanation:
I hope dis helps :D
A antibiotic that block protein synthesis and have broad spectrum
activities with relatively low toxicity is:
A. bacitracin
B. penicillin
C. vancomycin
D. erythromycin
E. levofloxacin
What is the disease called that increases your age with extreme progression?
Answer:
werner syndrome
Explanation:
Werner syndrome is a rare progressive disorder that is characterized by the appearance of unusually accelerated aging (progeria). Although the disorder is typically recognized by the third or fourth decades of life, certain characteristic findings are present beginning during adolescence and early adulthood.
hope it helps please mark me brainliest xD
Answer:
ur mum
Explanation:
1. Plant hormones include the following
except.
A. insulin
B. auxin
C. cytokinin
D. gibberellin
Answer:
insulin
Explanation:
it is a hormone found in humans.
abi you barb
launchpad A Drosophila mutation called singed (s) causes the bristles to be bent and misshapen. A mutation called purple (p) causes the fly’s eyes to be purple in color instead of the normal red. Flies homozygous for singed and purple were crossed with flies that were homozygous for normal bristles and red eyes. The F1 were intercrossed to produce the F2, and the following results were obtained. What are the genotypes of the parental flies in Cross 1
Answer:
ppss and PPSS
Explanation:
Just as indicated in the question above, Flies homozygous for singed and purple were crossed with flies that were homozygous for normal bristles and red eyes.
And a Drosophila mutation called singed (s) causes the bristles to be bent and misshapen.
A mutation called purple (p) causes the fly’s eyes to be purple in color instead of the normal red.
Thus, the genotypes of the parental flies in Cross 1 are
PPSS and ppss
Which descriptions apply to these two compounds? Check all that apply.
are isomers of each other
have same molecular formula
have same structural formula
are both hydrocarbons
have same number of each kind of atom
have same geometric arrangement of atoms
Image is not provided in the question. The required image is attached below.
Answer:
A. are isomers of each other
B. have same molecular formula
D. are both hydrocarbons
E. have same number of each kind of atom
Explanation:
The two given compounds are 3- methylpentane and 2,2 - Dimethylbutane.
They both are isomers with the same molecular formula C6H14. They both are made up of carbon and hydrogen called hydrocarbons.
As they have same molecular formula C6H14, so they have same number of each kind of atom including carbon and hydrogen.
Hence, the correct options are:
A.
B.
D.
E.
Answer:
a
b
d
e
Explanation:
Naval writes out the chemical equation for photosynthesis. She includes two reacting molecules to the left of the arrow and two resulting molecules to the right.
Light energy, above the arrow
Chlorophyll,to the left of the arrow
Enzymes, to the left of the arrow
ATP, above the arrow
Answer:
The question is incomplete. The remaining fragment that completes the question is: "What more must be added to the chemical equation to accurately represent photosynthesis? "
The answer is Light energy, above the arrow
Explanation:
Photosynthesis is a metabolic reaction unique to autotrophic organisms like plants, algae etc. It is the process whereby these organisms produce their food (glucose) using light energy from the sun.
Photosynthesis cannot occur without light, as the name implies: Photo- meaning light. The sun is the source of this light energy, which photosynthetic organisms like plants capture using a green pigment called CHLOROPHYLL.
Photosynthesis is a reaction with a general equation:
6CO2 + 6H2O ---light energy-----> C6H12O6 + 6O2
However, the energy needed to perform this reaction comes from light provided by the sun. Hence, Naval needs to put LIGHT above the arrow in her equation in order to accurately represent photosynthesis.
Do Now: b) Complete the following mRNA Strand: GCATACAGT (Be sure to look if it is asking for DNA or mRNA. DNA is GCAT and mRNA is GCAU. All answers must be in capitals when writing out bases, or the will be considered wrong.)
Answer:
CGUAUGUCA
Explanation:
Firstly, the strand in the question is a DNA strand because it contains the Thymine base, which is only found in a DNA molecule. The process of changing a DNA molecule into RNA molecule (specifically a messenger RNA) is called transcription. Transcription is done using the complementary base pairing rule, which states that Adenine (A) will always pair with Thymine (T), and Guanine (G) will always pair with Cytosine (C).
In the case of transcription, the Thymine bases will change to Uracil (U), since Uracil is only found in the RNA molecule. That is, A-U and G-C. Hence, a DNA strand that reads: GCATACAGT will produce a mRNA strand CGUAUGUCA.
If you follow the longest food chain in the food web below from grass to owl,
how many trophic levels are there?
grass
aspen
grasshopper
rabbit-fox
frog
#snake
owl
o
A. Three
B. Five
C. Four
D. Two
Answer:
I believe the correct answer is B. Five
The optical microscope is regularly used to identify bacteria and viruses. In 1918 the Spanish Flu infected almost one third of the world and was thought to be caused by bacteria. However, a virulent virus was the cause of the Spanish Flu. From what we have learned throughout this lab on microscopy, why weren't scientists able to identify the Spanish Flu with a microscope?
Answer:
In 1918, one of the deadliest pandemics in history took place, known as the Spanish flu. The flu infected almost 500 million individuals globally, that is, about 33 percent of the world's population. Due to the Spanish flu, the death of about 20 to 50 million people took place.
The general symptoms of the first wave of Spanish flu were fever, chills, and fatigue. However, during the second wave, the people started to die within hours after the development of the signs, due to the development of a fluid taking place within the lungs resulting in suffocation.
At the time of the Spanish flu pandemic, not much was known regarding the composition of the virus. The scientists at that time were not able to make a difference between a bacteria and a virus. This made it tough for scientists to determine the Spanish flu with the help of a microscope.
Can someone please help me
Answer:
Explanation:
Department of Transportation because they are in charge of regulating the safe travel and shipment of materials
Answer:
Department of Transportation
Explanation:
A health researcher was interested in finding out whether the DASH diet can lower a dieter’s blood pressure. Researchers compared the blood pressure before going on the diet with the same subject’s blood pressure after 12 weeks on the DASH diet. Which of the following is the most appropriate statistical test to use to test whether the DASH diet lowers blood pressure?
A) Matched pairs t-testB) Inference for regressionC) ANOVAD) Chi-squared test for independenceE) Two-sample t-test
Answer:
a matched pairs t-test
How many individuals show the trait being followed?
Correct answer gets brainlest
Answer: 8 carry the trait and 2 show the trait
Explanation: the halves are the carriers and the full ones are those who show the trait
Which helps prevent errors in DNA replication?
A. DNA is produced in the ribosomes.
B. There are no complementary base pairs in DNA.
C. DNA polymerase checks the DNA for errors.
D. DNA polymerase makes five DNA molecules from each single
strand, and keeps the best of the five.
DNA polymerase checks the DNA for errors and there are no complementary base pairs in DNA (Options B and C). It helps to prevent errors during DNA replication.
What is DNA replication?DNA replication refers to the cellular process aimed at generating two identical molecules of DNA during cell division.
DNA replication is a fundamental mechanism to sure the perpetuity of genetic material (i.e., the inheritance of genetic material).
During DNA replication, most DNA polymerases check the DNA for errors, repairing errors in a mechanism known as DNA proofreading.
Learn more about DNA replication here:
https://brainly.com/question/21265857