Unit 2 Review

What is the complementary base pairing in DNA?

• A-T, G-C

• A-G, T-C

• A-C, G-T

• A-A, G-G

What are the three components of a DNA nucleotide?

• sugar (deoxyribose), phosphate, and nitrogenous base

• sugar (ribose), phosphate, and nitrogenous base

• sugar (glucose), phosphate, and nitrogenous base

• sugar (fructose), phosphate, and nitrogenous base

Transcription is where DNA is used to create _______. This process occurs in the _________.

• mRNA; nucleus

• mRNA; cytoplasm

• DNA; nucleus

• DNA; cytoplasm

• tRNA; nucleus

Translation is where mRNA is used to create _______. This process occurs in the _________.

• amino acids; nucleus

• proteins; mitochondria

• tRNA; cytoplasm (ribosome)

• amino acids; cytoplasm (ribosome)

• tRNA; nucleus

A DNA molecule contains 20% A. How much % G is there?

• 10% G

• 20% G

• 30% G

• 40% G

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

• Replication

• Translation

• Transcription

• Mutation

What is the process called where DNA is duplicated?

• Transcription

• Translation

• Replication

• Mutation

Which molecule is synthesized during transcription?

• DNA

• Protein

• RNA

• Lipid

A segment of DNA is shown in the diagram. Which of these identifies the part of the DNA segment labeled X?

• Nucleotide

• Phosphate group

• Hydrogen bond

• Deoxyribose

Tags

B.6(A)

A Nucleotide is shown above. What part of the Nucleotide is labelled "3"?

• Sugar

• Phosphate

• Nitrogenous Base

Answer explanation

The correct choice is Nitrogenous Base because label '3' in the Nucleotide represents the Nitrogenous Base, which is a key component of a nucleotide.