Biology Quiz: Understanding DNA

What is a change in DNA called?

• nondisjunction

• DNA replication

• mitosis

• mutation

If a cat has 38 chromosomes at the beginning of DNA synthesis, how many chromosomes does it have after the DNA has been duplicated?

• 19

• 144

• 72

• 38

What is the cell’s complete complement (total amount) of DNA called?

• helicase

• cell cycle

• mitosis

• genome

What is the shape of a DNA molecule?

• chromosome

• double helix

• twisted clover

• histone

If the template strand of DNA codes ATTCG, what should the antiparallel copy strand code be?

• ATTCG

• ATCGC

• TAAGC

• TAAGG

Which protein is the enzyme that unwinds DNA during replication?

• telomerase

• histone

• DNA polymerase

• helicase

Which type of RNA is responsible for carrying the genetic code from the nucleus to the ribosomes during protein synthesis?

• rRNA (ribosomal RNA)

• tRNA (transfer RNA)

• miRNA (microRNA)

• mRNA (messenger RNA)

What is the primary function of mRNA in the process of protein synthesis?

• To carry the genetic code from DNA to the ribosomes

• To carry amino acids to the ribosomes

• To provide the structure of ribosomes

• To catalyze the formation of peptide bonds

Where are ribosomes primarily located in eukaryotic cells?

• In the cytoplasm or attached to the endoplasmic reticulum

• In the cell membrane

• In the cell nucleus

• In the endoplasmic reticulum

Which of the following is a similarity between DNA and RNA?

• Both contain the sugar ribose.

• Both use thymine as a nitrogenous base.

• Both have a double-stranded helical structure.

• Both store and transmit genetic information.