Biology Quiz

The breaking down of macromolecules into water and carbon dioxide is:

• Anabolism.

• Catabolism.

• Homeostasis.

• Hormesis.

Which of the following is part of interphase?

• DNA synthesis phase

• Go phase

• Prophase

• Protein synthesis phase

Which of the following molecules is a protein?

• A lipid

• A nucleic acid

• An amino acid

• An enzyme

Which of the following is the nitrogenous organic base found in RNA but not in DNA?

• Adenine

• Cytosine

• Thymine

• Uracil

The nucleic acids of the cell:

• Are found only in the nucleus.

• Are macromolecules.

• Consist of DNA and RNA.

• Have a backbone of peptide bonds.

Most radiobiologic research is conducted with animals. Approximately how many human population groups have shown radiation effects?

• None

• Less than 5

• 5 to 10

• 10 to 20

Watson and Crick:

• Accurately described a living cell in 1673 based on microscopic observations.

• Described the molecular structure of DNA in 1953.

• Discovered x-ray crystallography.

• First named the cell in 1665.

Approximately what percentage of the body is water?

• 35

• 50

• 65

• 80

Which of the following are present in all tissues of the body and are the structural components of cell membranes?

• Carbohydrates

• Lipids

• Nucleic acids

• Proteins

The chief function of carbohydrates in the body is to:

• Assist in maintaining body temperature.

• Exercise regulatory control over functions such as growth and metabolic rate.

• Provide a defense mechanism against infection and disease.

• Provide fuel for cell metabolism.