CH 10 and 11 Review and Enrichment

We would expect that a 15-nucleotide sequence that includes a STOP codon at the end (as part of the 15 nucleotide sequence) will direct the production of a polypeptide that consists of

• four amino acids

• five amino acids

• two amino acids

• three amino acids

Which of the following statements regarding the structure of DNA is FALSE?

• In a DNA molecule, A bonds to T and C bonds to G

• The DNA molecule has a uniform diameter

• Watson and Crick received a Nobel prize for their description of the structure of DNA

Which of the following BEST depicts the flow if information when a gene directs the synthesis of a cellular component?

• DNA - RNA - Protein

• DNA - tRNA - mRNA - protein

• protein - RA - DNA

A single base mutation occurs in a gene that codes for a protein due to an error in DNA replication. Which of the following outcomes is NOT possible

• The mutation results in a longer or shorter protein or a protein of the same length

• The mutation results in changed protein function

• The mutation results in mRNA being made from the protein

• The mutation results in a human disease

Which of the following occurs when RNA polymerase attaches to the promoter DNA?

• initiation of a new polypeptide chain

• termination of the RNA molecule

• initiation of a new RNA molecule

• elongation of the growing RNA molecule

How would the shape f a DNA molecule change if adenine paired with guanine and cytosine paired with thymine?

• The DNA molecule would be shorter

• The DNA molecule would have irregular widths along its length

• The DNA molecule would be longer

• The DNA molecule would be circular

WHich of the following statements regarding RNA is FALSE?

• RNA molecules have a sugar/phosphate backbone

• RNA contains the nitrogenous base uracil

• RNA contains the sugar dextrose

The directions for each amino acid in a polypeptide are indicated by a codon that consists of ____________ nucleotides in an RNA molecule

• 5

• 3

• 2

• 4

Which of the following statements regarding DNA is FALSE?

• One DNA molecule can include four different nucleotides in its structure

• DNA contains the sugar deoxyribose

• DNA contains the nitrogenous base uracil

• DNA molecules have a sugar-phosphate backbone

Consider the following sentence: "The dog did not eat." Which of the following variations of this sentence is most like a frameshift mutation?

• The did dog not eat.

• The did not eat.

• The dog did dog did not eat.

• The dod idn ote at.