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dimulka [17.4K]
3 years ago
10

The ras proto-oncogene can become an oncogene by a single point mutation that alters its protein product to have _______ activit

y.
A. more GTPase
B. less nucleotide exchange
C. greater nucleotide exchange
D. constitutive Raf-activation
Biology
1 answer:
34kurt3 years ago
7 0

Answer:

The correct answer is D.

Explanation:

The Ras Proto-Oncogene is a gene found in normal cells, which by the single point mutation mentioned in the question, can turn into Oncogene. Because Proto-Oncogene is a gene that controls and regulates the division of the cell, a mutation in this gene leads to uncontrolled cell divisions which then leads to cancer. The correct answer is D since RAF-Activation describes "Rapidly Accelerated Fibrosarcoma, fibrosarcoma being a cancer which affects fibrobalst cells.

I hope this answer helps.

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Masteriza [31]

Answer:

in order going from the top to the bottom.

water is compound composed of three atoms

- 1 Hydrogen, 2 oxygens

Cohesive

Because water is a polar molecule it is a good solvent

sweating can have a cooling effect due to evaporation. this is becayse energy is needed to break waters hydrogen bonds.

Frozen water is less dense than liquids water causing ice to float

Explanation:

8 0
3 years ago
1. In pea plants, tall (T) is dominant to dwarf (t). Show the cross
MA_775_DIABLO [31]

Answer:

Tt - 2/4 = 1/2 or 50%            Heterozygous TALL

tt - 2/4 = 1/2 or 50%             Homozygous Dwarf

Explanation:

So let's make a Punnett for this so you can see what the outcome is yourself:

Tall is <u>dominant</u> - T

Dwarf is <u>recessive</u> - t

Heterozygous means that they have one of each allele. The genotype of one parent would be then Tt.

***It is heterozygous tall because Tall is a dominant trait so if it is accompanied by the recessive trait dwarf, then the Tall allele would mask it.

The other parent is a dwarf plant. The genotype would then be tt.

*** Now for a recessive trait to appear, it should not have a dominant trait mixed with it, which could mask it. The result then is homozygous recessive or homozygous Dwarf.

So now that we know the genotypes of the parent plants, we can put it into a Punnet:

    t      t

T  Tt   Tt

t   tt    tt

As you can see, out of the 4 outcomes we have:

Tt - 2/4 = 1/2 or 50%            Heterozygous TALL

tt - 2/4 = 1/2 or 50%             Homozygous Dwarf

5 0
3 years ago
Why do living organisms release energy gradually?
zaharov [31]

it is more efficient  for the body and it gives them time to collect more

4 0
2 years ago
True or false: The energy contained in the food we eat directly powers all of our cellular activities. If false, please make it
Gwar [14]

Answer:

False

"The energy contained in the food we eat is used to synthesize the energy that directly powers all of our cellular activities".

Explanation:

The food we eat undoubtedly contains energy. This energy is stored in the bonds of the molecules that make up the food. However, the food undergoes the process of digestion to yield glucose (a sugar). This glucose sugar is used in the process of CELLULAR RESPIRATION to synthesize a form of chemical energy usable by cells called ATP.

ATP or Adenosine triphosphate is a molecule that stores chemical energy in living cells. It is the molecule that directly powers all of our cellular activities. Hence, the statement in this question is FALSE. The correct statement should be "The energy contained in the food we eat is used to synthesize the energy that directly powers all of our cellular activities".

5 0
2 years ago
In what two ways did the Soviets stray from the ideas about communism advanced by Karl Marx?
nikitadnepr [17]

Answer:

By not giving powers to workers.

Explanation:

  • They added other ideas to this body of the argument, Marx said that industrial society was capitalist.
  • He was more concerned that workers would triumph in their conflict was capitalists.
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6 0
3 years ago
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