NAD is an example of:
Correct answer: B. Dinucleotide
- A. Mononucleotide
- B. Dinucleotide
- C. Trinucleotide
- D. Tetranucleotide
Explanation
Nicotinamide adenine dinucleotide (NAD) is a cofactor central to metabolism. Found in all living cells, NAD is called a dinucleotide because it consists of two nucleotides joined through their phosphate groups. The cellular respiration processes of all living cells make use of the coenzyme Nicotinamide adenine dinucleotide (NAD). It plays a key role in energy metabolism by accepting and donating electrons. The low energy form NAD+, shown at left, is raised to the high energy form 'NADH'.
This question appeared on the PMC National MDCAT 2020 paper, which you can sit online with every answer explained.
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About Ribonucleic Acid (RNA)
Ribonucleic acid is generally a single-stranded nucleic acid containing ribose and uracil instead of thymine. Coverage includes mRNA, tRNA and rRNA, complementary base pairing, transcription and translation, and the differences between RNA and DNA in structure, location and biological function.
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