Genetics Practice Test

Which of the four molecules is found in DNA?

• ribose

• deoxyribose

• uracil

• glucose

The main difference between the four nucleotides that make up DNA is that they have different __________.

• sugars

• uracil

• phosphates

• nitrogen bases

In human cells, where does DNA replication take place?

• Cytoplasm

• Nucleus

• Ribosome

• Vacuole

The cellular process of creating two new DNA molecules from one original copy is called replication. Which statement is the BEST description of this process?

• DNA opens up and RNA copies it.

• DNA opens up and is used for two DNA molecules different from the original.

• DNA opens up and each strand is used to make an identical strand of DNA.

• RNA opens up and is used to make a new strand of DNA.

Amino acids in a polypeptide are held together by peptide bonds, a specific type of covalent bond.

• true

• false

The sequence of __________ in a DNA molecule determines the protein that will be produced.

• lipids

• nucleotides

• proteins

• sugars

What is the role of transfer RNA (tRNA) in protein synthesis?

• Carrying the messenger RNA to the ribosome

• Bringing amino acids to the ribosome

• Reading off the genes in the DNA

• Coding for three amino acids in a protein

What is the result of translation?

• DNA

• Protein

• mRNA

• Lipids

What is the primary function of tRNA during translation?

• Synthesizing DNA

• Carrying amino acids to the ribosome

• Decoding mRNA

• Forming peptide bonds

What is the structure of DNA?

• Single Strand

• Triple Helix

• Double Helix

• Quadruple Strand