Answer:
proteins
Explanation:
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A. stop responding to growth regulators
B. stop dividing to produce daughter cells
C. generate hormones that combat tumors
D. produce cells without a defective p53 gene
ANSWERS TO CELL PRACTICE TEST
1.C
2.A
3.D
4.D
5.B
6.A
7.B
8.A
9.B
10.A
DNA
RNA
proteins
new cells
Question 2.2. Which sentence correctly describes transcription? (Points : 1)
RNA is the direct result of DNA transcription.
Proteins are the direct result of RNA transcription.
Protein transcription takes place in the nucleus of a cell.
RNA transcription takes place in the cytoplasm of a cell.
Question 3.3. What is the DNA backbone made of? (Points : 1)
a nitrogenous base and a sugar molecule
nitrogenous bases, sugar, and phosphates
sugar and phosphates
a polymer of nitrogenous bases
Question 4.4. If a segment of one strand of a DNA molecule has 500 adenine bases, how many thymine bases does the other strand have? (Points : 1)
500
250
0
You can't tell from that data.
1. Proteins
After RNA is formed, it is transported out of the nucleus and goes to the cytoplasm. From the cytoplasm, it goes into the ribosomes, where protein synthesis occurs. Together with transfer RNA (tRNA), mRNA will direct protein synthesis.
2. RNA is the direct result of DNA transcription.
Transcription is a process where DNA is transcribed into messenger RNA (mRNA). This carries all the information that will be needed to synthesize proteins.
3. Sugar and phosphates
The backbone of DNA, is made of sugar and phosphate. They form the structural framework of nucleic acids. They are arranged alternately, sugar-phosphate group-sugar and so on. The backbone refers to the sides of the DNA "ladder."
4. 500
In base pairing, guanine and cytosine pair up and adenine pairs up with thymine. Fore every adenine, there will be a thymine. If there are 500 adenine bases, there will be one for each one. So the answer is 500.
Cell respiration occurs in animal cells and not plant cells.
Photosynthesis uses chemical energy as energy source, and cell respiration uses light energy.
Photosynthesis uses light as energy source, and cell respiration uses chemical energy.
Correct answer: Photosynthesis uses light as energy source, and cell respiration uses chemical energy
Photosynthesis is a light dependent process in which green plants and certain other organism convert light energy in to chemical energy. In this process sunlight is uses to to convert water and carbon dioxide into ATP molecule which are needed for growth.
Cellular respiration is metabolic process that occurs inside the mitochondria of the cell to convert biochemical energy which is derived from nutrients into ATP (Adenosine triphosphate) and removal of waste products.
Photosynthesis uses light as an energy source, while cell respiration uses chemical energy. Therefore option d. is the correct answer.
The correct statement that distinguishes photosynthesis and respiration is:
Photosynthesis uses light as an energy source, and cell respiration uses chemical energy.
In photosynthesis, plants convert light energy into chemical energy, specifically glucose. This process occurs in the chloroplasts of plant cells.
On the other hand, cell respiration is the process by which cells break down glucose to release energy in the form of ATP (adenosine triphosphate).
This process occurs in both plant and animal cells, specifically in the mitochondria.
Therefore, photosynthesis uses light as its energy source, while cell respiration uses chemical energy.
Therefore option d. is the correct answer.
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The answer is a sea turtle.
The creature had a backbone, so it must be vertebrate. Among the vertebrates, there are no infinitive number of animals with shells. It could be only turtles. The characteristic such as a beaklike mouth without teeth supports a surmise. Limbs in the form of flippers suggest that animal must live in the water, and with such a dimensions it could live only in seas. All of these speak for the sea turtle fossil.
Answer:
sea turtle
Explanation:
Osmosis is the movement of water through a semipermeable membrane from high to low concentration. It is driven by the imbalance in water concentration and facilitated by aquaporins. Osmosis plays a crucial role in the functioning of red blood cells and the kidneys.
Osmosis is the movement of water through a semipermeable membrane according to the water's concentration gradient across the membrane, which is inversely proportional to the solutes' concentration. While diffusion transports material across membranes and within cells, osmosis transports only water across a membrane and the membrane limits the solutes' diffusion in the water. Not surprisingly, the aquaporins that facilitate water movement play a large role in osmosis, most prominently in red blood cells and the membranes of kidney tubules.
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