Unit 6 Review (Finish)

Which molecule in Figure 12-3 brings the genetic information from DNA to the ribosome in the form of codons?

• A

• B

• C

• D

What process is illustrated in Figure 12-5?

• A. protein synthesis

• B. transcription

• C. DNA replication

Identify structure C in Figure 12-5.

• A. ribosome

• B. tRNA

• C. mRNA

• D. DNA

Which of the following statements is not correct concerning DNA and RNA?

• A. Both DNA and RNA contain the base cytosine.

• B. Both RNA and DNA are double-stranded molecules.

• C. RNA contains the base uracil while DNA contains thymine.

• D. DNA contains a sugar named deoxyribose while RNA contains a sugar named ribose.

If the original DNA sequence reads TAG, the mRNA codon would be _______.

• UAG

• AUC

• ATC

If the original DNA sequence reads TAG, the corresponding amino acid would be _______.

• stop

• isoleucine

• serine

_______ in a mRNA sequence would lead to the polypeptide chain valine-methionine-phenylalanine.

_______ in a mRNA sequence would correspond to a "stop" codon.

GCC in a DNA sequence after transcription and translation would correspond to the amino acid _______.

• threonine

• methionine

• arginine

A gene codes for ________.

• proteins

• DNA

• carbohydrates

• lipids