Trace elements are those required by an organism in only minute quantities. Which of the following is a trace element that is required by humans and other vertebrates, but not by other organisms such as bacteria or plants?

#Question id: 64

#Section C (Domain-Specific Knowledge)

Testosterone and estradiol are male and female sex hormones, respectively, in many vertebrates. In what way(s) do these molecules differ from each other? Testosterone and estradiol ________.

#Question id: 65

#Section C (Domain-Specific Knowledge)

Identify which of the following pair is enantiomers, diastereomers or meso compounds.

#Question id: 66

#Section C (Domain-Specific Knowledge)

Which of the following statements regarding isomerism is incorrect regarding biomolecules?

#Question id: 67

#Section C (Domain-Specific Knowledge)

When a region of DNA must be repaired by removing and replacing some of the nucleotides, what ensures that the new nucleotides are in the correct sequence?

#Question id: 68

#Section C (Domain-Specific Knowledge)

Match the following functional groups given in column I with their respective representatives given in column II.

COLUMN I               COLUMN II

1. Anhydride               a. RCOOR

2. Ether                       b. ROCOCH3

3. Acetyl                     c. ROR

4. Amido                     d. RCOOCOR

5. Ester                        e. RCONH2

#Question id: 69

#Section C (Domain-Specific Knowledge)

Which of the following is the diastereomer of the following compound?