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sineoko [7]
3 years ago
14

In eukaryotes, the first amino acid in a growing polypeptide chain is always _______ because the only codon for this amino acid

is also the _______ codon. This amino acid is not always the first amino acid in a processed protein because of
Biology
1 answer:
Minchanka [31]3 years ago
7 0

Answer:

1. Methionine

2. Start codon

3. Proteolysis

Explanation:

The process of translation begins when the codons are read by the tRNA molecule which with anticodon loop identifies the codon and then brings the specific amino acid corresponding the codon.

The translation begins when a specific nucleotide sequence 'AUG' called start codon is read by the tRNA. The AUG codon code for Methionine amino acid therefore in a growing polypeptide methionine is present but post-translational modification called proteolysis can remove the methionine amino acid.

Thus, Methionine, Start codon and Proteolysis are correct.

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Crossing over contributes to genetic variation by exchanging chromosomal segments between:_____.
yulyashka [42]

Crossing over contributes to genetic variation by exchanging chromosomal segments between non-sister chromatids of homologous chromosomes.

What is crossing over?

  • Crossing over is the exchange and recombination of genetic components between the homologous chromosomes.
  • This occurs in the pachytene stage of the meiosis-1 of the meiotic division.
  • Crossing over occurs with the help of an enzyme and the enzyme responsible for crossing over is called Recombinase.

Thus, crossing over contributes to genetic variation by exchanging chromosomal segments between non-sister chromatids of the homologous chromosomes.

Learn more about crossing over: brainly.com/question/927405

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3 0
2 years ago
The foot is ___ to the nose
Vlad [161]

Answer:

below

Explanation:

what are the options?

3 0
3 years ago
all fibers of the semimembranosus muscle converge to insert on the . all fibers of the semimembranosus muscle converge to insert
miss Akunina [59]

All fibers of the semimembranosus muscle are converged to insert on the posterior tibia.  

Semimembranosus muscle is amongst the hamstring muscles that are present in the posterior region of the thighs. These are the muscles responsible for the extension of the hips and flexion of the knee. The innervation to this muscle is provided by the tibial nerve.

Tibia is also called the shinbone. It is one of the two bones of the lower leg.  The bone carries the maximum of the body's weight and gains support from the fibula, the other bone of the lower leg. Tibia is also the most commonly fractured bone in maximum people.

To know more about tibia, here

brainly.com/question/14212355

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8 0
1 year ago
The picture shows an organ system in the human body. What do these organs do in the human body?
olga2289 [7]

The organs represented in the image are the Brain, nerve, and spinal cords that monitor and react to changes in the body and its environment.

<h3>What are Organs?</h3>

Organs may be defined as an assemblage of tissues that structurally construct an operational unit specialized to accomplish a distinct operation and functions in the body of a living organism.

The nerves function in sending and receiving signals to the brain from external stimuli. They give the perception of feeling pain, relaxation, stress, etc to the brain according to the situations.

The complete question is as follows:

The picture shows an organ system in the human body.

Brain, Nerve, and spinal cord.

What do these organs do in the human body?

  • They filter pathogens and dead cells out of lymph before it returns to the blood.
  • They monitor and react to changes in the body and its environment.
  • They release hormones that control the activities of cells and organs.
  • They identify and destroy things that are foreign or harmful to the body.

Therefore, the correct option for this question is B, i.e. They monitor and react to changes in the body and its environment.

To learn more about Organs, refer to the link:

brainly.com/question/1126526

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5 0
2 years ago
Where do reactants of photosynthesis come from? a. glucose b.we exhale them c. we inhale them from the atmosphere d.plants give
Ne4ueva [31]

Answer:

c

Explanation:

6 0
3 years ago
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