Question 1 of 10

Biology

1 answer:

Mice21 [21]3 years ago

4 0

Answer:

Explanation:

A - Nucleic acids do not change into amino acids. Rather, it is the specific sequence of nucleotides in nucleic acids that directs the formation of proteins.

B - Peptides are not bonded to nucleic acids directly. The codons in mRNA are bonded to tRNA molecules, which in turn is bonded to an amino acid.

C - DNA strands are not bonded to amino acids. It is the codons in a strand of mRNA that are bound to tRNA molecules carrying an amino acid.

D - This is correct. The specific sequence of codons in mRNA give rise to a specific sequence of amino acids in the protein formed.

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Almost immediately after injection, you find yourself swept into a good-sized chamber, the _(1)_. However, you do not stop in th

Pepsi [2]

Answer:

Almost immediately after injection, you find yourself swept into a good-sized chamber, the left atrium. However, you do not stop in this chamber, but continue to plunge downward into a larger chamber below. You land with a large splash and examine your surroundings. All about you are huge white cords, hanging limply from two flaps of endothelial tissue far above you. You report that you are sitting in the left ventricle chamber of the heart, seeing the flaps of the mitral valve above you. The valve is open and its anchoring cords, the chordae tendineae, are lax. Since this valve is open, you conclude that the heart is in the systole/contraction phase of the cardiac cycle.

Explanation:

Once the oxygenated blood enters the heart through the pulmonary vein, it goes to the left atrium. From there, it goes down to the left ventricle passing through the mitral valve, also known as the bicuspid valve. This valve prevents blood's backflow when the heart contracts, allowing the blood's flow from the ventricle to the aorta.

The chordae tendineae, also known as tendinous cords, are in the mitral and the tricuspid valve. They are cords that are attached to the valve and the heart walls. They are lax during atrial systole, and with the help of blood pressure, they allow the valve to open and welcome the blood into the left ventricle. The tendinous cords are tense during ventricle systole preventing the valve from opening and causing a backflow from the ventricle to the atrium.

8 0

3 years ago

The frequency of carriers for a rare autosomal recessive genetic condition is 0.04 in a population. Assuming this population is

dem82 [27]

Answer:

Option E, Not enough information is provided.

Explanation:

Given

Frequency of carriers for a rare autosomal recessive genetic condition $= 0.04$