The Following Questions Are Based on the Reaction a

question 9

Multiple Choice

The following questions are based on the reaction A + B → C + D shown in Figure 8.2.


-In order to attach a particular amino acid to the tRNA molecule that will transport it, an enzyme, an aminoacyl-tRNA synthetase, is required, along with ATP. Initially, the enzyme has an active site for ATP and another for the amino acid, but it is not able to attach the tRNA. What must occur in order for the final attachment to occur?

• A)The ATP must first have to attach to the tRNA.
• B)The binding of the first two molecules must cause a 3-dimensional change that opens another active site on the enzyme.
• C)The hydrolysis of the ATP must be needed to allow the amino acid to bind to the synthetase.
• D)The tRNA molecule must have to alter its shape in order to be able to fit into the active site with the other two molecules.
• E)The 3' end of the tRNA must have to be cleaved before it can have an attached amino acid.

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Definitions:

44 Chromosomes

An atypical number of chromosomes in humans, which usually have 46. This condition can lead to certain genetic disorders or syndromes.

Chromosomal Pairs

The sets of two chromosomes in each cell of an organism, with one inherited from each parent, crucial for genetic traits and reproductive processes.

Chromosomes

Thread-like structures located inside the nucleus of animal and plant cells, made of protein and a single molecule of DNA, carrying genetic information.

Nucleus

In biology, the membrane-bound organelle found in eukaryotic cells that contains most of the cell's genetic material.