Pre-AP Biology

Which of the following processes occurs during the light-dependent reactions of photosynthesis?

• A) Carbon fixation

• B) ATP synthesis

• C) Calvin cycle

• D) Glycolysis

Tags

NGSS.HS-LS1-5

In a Mendelian monohybrid cross, what is the expected phenotypic ratio of the offspring?

• 1:1

• 3:1

• 9:3:3:1

• 1:2:1

Which of the following best describes the role of ribosomes in a cell?

• DNA replication

• Protein synthesis

• Lipid metabolism

• Carbohydrate storage

Cytosine makes up 38% of the nucleotides in a sample of DNA from an organism. Approximately what percentage of the nucleotides in this sample will be thymine?

• 12%

• 24%

• 31%

• 38%

Replication in prokaryotes differs from replication in eukaryotes for which of these reasons?

• Prokaryotic chromosomes have a single origin of replication, whereas eukaryotic chromosomes have many.

• Prokaryotes produce Okazaki fragments during DNA replication, but eukaryotes do not.

Which of the following covalently connects segments of DNA?

• helicase

• DNA polymerase

• ligase

synthesizes short segments of RNA?

• helicase

• DNA polymerase

• primase

The genetic code is essentially the same for all organisms. From this, one can logically assume all of the following except

• a gene from an organism could theoretically be expressed by any other organism.

• all organisms have a common ancestor.

• DNA was the first genetic material.

• the same codons in different organisms usually translate into the same amino acids.

Tags

NGSS.HS-LS4-1

What are the coding segments of a stretch of eukaryotic DNA called?

• introns

• exons

Introns are significant to biological evolution because

• their presence allows exons to be shuffled.

• they protect the mRNA from degeneration.