AP Bio Review Quiz #2

What is the term used to describe a trait that is not common but genetically dominant?

• Recessive trait

• Polydactyly

• Selective trait

• Common trait

Tags

NGSS.HS-LS4-2

NGSS.HS-LS4-3

NGSS.HS-LS4-4

In a dihybrid cross, what is the expected phenotypic ratio for complete dominance?

• 9:3:3:1

• None of the above

• 3:1

• 1:2:1

Tags

NGSS.HS-LS3-3

What is the purpose of a chi-square test in genetics?

• To determine protein structures

• To test the independence of linked genes

• To calculate the probability of trait inheritance

• To confirm the expected ratios of genetic crosses

Tags

NGSS.HS-LS3-3

NGSS.HS-LS4-3

Which enzyme is responsible for unzipping the DNA double helix during replication?

• Primase

• Ligase

• Helicase

• Polymerase

What does a 5' cap in mRNA processing do?

• None of the above

• Initiates replication

• Signals the ribosome binding site

• Terminates transcription

What is the function of mRNA in the process of translation?

• It binds to the small subunit of the ribosome and provides the template for protein synthesis.

• It carries amino acids to the ribosome.

• It acts as a catalyst in the ribosome.

• It modifies the DNA structure before transcription.

Which mutation does not change the amino acid sequence of a protein?

• Missense mutation

• Nonsense mutation

• Silent mutation

• Frameshift mutation

Tags

NGSS.HS-LS3-2

What is the role of a repressor in a prokaryotic operon?

• It binds to the operator to block transcription.

• It modifies the mRNA after transcription.

• It speeds up the transcription process.

• It binds to the promoter to initiate transcription.

What is the purpose of gel electrophoresis in biotechnology?

• To cut DNA into smaller fragments

• To separate molecules based on size and charge

• To replicate DNA sequences

• To amplify DNA segments

Which enzyme is used in PCR to synthesize new DNA strands?

• RNA polymerase

• Ligase

• Taq polymerase

• Helicase