AP Biology Units 5 & 6 Review

This video tutorial, led by Tiffany Jones, provides a comprehensive review of genetics and molecular genetics, focusing on inheritance patterns, the central dogma of molecular biology, mutations, operons, and biotechnology techniques. It aims to prepare students for the AP Biology exam by covering key concepts such as DNA replication, transcription, translation, and gene regulation. The session includes practice questions and a Q&A segment to reinforce learning.

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

• Recessive trait

• Polydactyly

• Selective trait

• Common trait

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

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

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

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