Practice quiz - RNA structure and transcription

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Directions: Choose the best answer for each of the following questions. When you are finished, click on the "Ready to be graded" button.

1. The function of rRNA is to

synthesize DNA

synthesize mRNA

form ribosomes

transfer amino acids to ribosomes

2. Which of the following types of RNA carries the instructions for making proteins?

mRNA

rRNA

tRNA

all of the above

3. RNA differs from DNA in that RNA

is sometimes single-stranded

contains a different sugar molecule

contains the nitrogen base uracil

all of the above

4. Which of the following is NOT found in RNA?

adenine

cytosine

thymine

guanine

5. In RNA molecules, adenine is complementary to

cytosine

guanine

thymine

uracil

6. Given the following strand of mRNA, identify the strand of DNA from which it was made.

mRNA: CUCAAGUGCUUC

CUCAAGUGCUUC

GAGUUCACGAAG

GAGTTCACGAAG

AGACCTGTAGGA

7. Each nucleotide triplet in mRNA that specifies a particular amino acid is called a(n)

mutagen

codon

anticodon

exon

8. codon: nucleotides::

ribosomes : binding sites

ribosome : DNA molecules

RNA : bases

DNA : bases

9. During transcription

proteins are synthesized

DNA is replicated

RNA is produced

translation occurs

10. Transcription proceeds when RNA polymerase

attaches to a ribosome

binds to a strand of DNA

binds to a strand of RNA

attaches to a promoter molecule

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