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Which of the following nucleotides is only found in RNA?

A. Guanine

B. Thymine

C. Uracil

D. Adenine

Answer Explanation:

Uracil is the nucleotide that is only found in RNA. The other nucleotides are found in both DNA and RNA

Therefore, the Correct Answer is C.

Q #1: in which of the following locations does fertilization of an egg cell typically occur?

A. Fallopian Tube

B. Ovary

C. Uterus

D. Cervical canal

Answer Explanation

Fertilization occurs in the fallopian tube and not in the ovary, uterus, or cervical canal.
Q #2: Which of the following organs removes nitrogenous waste from the body?

A. Large Intestines

B. Liver

C. Kidneys

D. Gall Bladder

Answer Explanation

The kidneys are the primary organs involved in the excretion of nitrogenous wastes. Nitrogenous wastes are mostly products of protein metabolism in the liver. One of the common nitrogenous waste products is urea, which is excreted through the kidneys.
Q #3: Which of the following describes one difference between skeletal muscles and cardiac muscles?

A. Skeletal muscles are found in the viscera whereas cardiac muscles are found in the cranium

B. Cardiac muscles contain intercalated discs, whereas skeletal muscles do not

C. Cardiac muscles are voluntary, whereas skeletal muscles are involuntary

D. Skeletal muscles are autorhythmic, whereas cardiac muscles are not

Answer Explanation

Cardiac muscles have intercalated discs that enable them to contract in a coordinated manner. Skeletal muscles do not have intercalated discs, as their contraction is under voluntary control and does not require the same level of synchronization seen in the involuntary contraction of cardiac muscle.

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