2024 Biology Semester Exam

Front

What type of bacteria is stained by the Gram stain method and appears pink under a microscope?

Back

Gram negative bacteria.

Front

Which nitrogenous base is found in DNA but not in RNA?

Back

Thymine.

Front

What is the primary function of nucleic acids in living organisms?

Back

Stores genetic information.

Front

What is the process called where DNA is copied to produce RNA?

Back

Transcription.

Front

What is the process called where RNA is used to synthesize proteins?

Back

Translation.

Front

What is an antibiotic?

Back

A substance that kills bacteria.

Front

What type of bacteria retains the crystal violet stain and appears purple?

Back

Gram positive bacteria.

Front

What are the four nitrogenous bases found in RNA?

Back

Adenine, Uracil, Guanine, Cytosine.

Front

What is the role of ribosomes in a cell?

Back

They are the site of protein synthesis.

Front

What is the difference between DNA and RNA in terms of structure?

Back

DNA is double-stranded, while RNA is single-stranded.