AP Bio - DNA, Protein, Enzymes (no replication)

Which of the nucleotides below could be found in DNA?

• Deoxyribose-Phosphate-Adenine

• Deoxyribose-Phosphate-Uracil

• Ribose-Phosphate-Adenine

• Ribose-Phosphate-Uracil

Tags

NGSS.HS-LS1-1

If a portion of DNA strand reads:

3' A A A T T T C 5'

The matching strand would read...

• 5' T T T A A A G 3'

• 3' T T T A A A G 5'

• 5' A A A T T T C 3'

• 3' U U U A A A G 5'

A repressor protein

• prevents DNA synthesis

• attaches to ribosomes during translation

• destroys amino acids before protein synthesis occurs

• blocks movement of RNA polymerase

A promoter is a

• binding site for DNA polymerase

• binding site for RNA polymerase

• start signal for transcription

• stop signal for transcription

Identify the molecule in the image below.

• nucleotide

• nucleic acid

• amino acid

• fatty acid

Tags

NGSS.HS-LS1-6

The tremendous variation and unique properties of proteins are most likely a result of

• interactions between R groups of the amino acids

• hydrogen bonds lining amino acids

• interactions between amino groups of the amino acids

• peptide bonds lining amino and carboxyl groups

What is the function of the poly-A tail in mRNA?

• to add modified guanin to the 3' end of the mRNA
• to indicate the site of translational termination
• to code for the binding of RNA polymerase to the DNA
• to help protect the mRNA from degradation by hydrolytic enzymes 

How can a person's muscle cells have identical DNA sequences as their nerve cells even though they perform different functions?

• The two different cells become mutated

• The proteins expressed in each cell are different

• They actually have different DNA in the two types of cells.

• The genome of the different cells changes

Tags

NGSS.HS-LS1-1

In the operon diagram, what is represented by the yellow shape?

• RNA polymerase

• Inducer

• Repressor

• Operator

Tags

NGSS.HS-LS1-1

The graph shows the relative rates of action of four enzymes, A, B, C, and D. Which enzyme shows the greatest change in its rate of action with the least change in pH?

• enzyme A 
• enzyme B 
• enzyme C
• enzyme D