Question 561 pts

Unlike many physiological substances, metabolism of ammonia is under very strict control because:

Group of answer choices

Ammonia is relatively insoluble in water

Ammonia is a flammable gas

Ammonia is very toxic

Ammonia could be consumed by intestinal bacteria if they were not held in check

Which of the following recognize a specific amino acid and its cognate t-RNA molecule?

Group of answer choices

t-RNA synthetase

Ribososme

r-RNA

Topoisomerase

If pK1 = 2.34 and pK2 = 9.60, then the isoelectric point pI is?

Group of answer choices

5.87

5.97

3.67

11.94

A deletion mutation occurs, leaving 11 bases in nucleotide sequence.

What is the maximum number of amino acids that could be coded for by this sequence?

Group of answer choices

3

4

6

11

Prior to being transferred to oxygen, the last site of electrons in the electron transport chain is

Group of answer choices

Ubiquinone

The cytochrome oxidase complex

The bc1 complex

The NADH dehydrogenase complex