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Concepts of Biology

Review Questions

Concepts of BiologyReview Questions
2.

Which of the following does cytosine pair with?

  1. guanine
  2. thymine
  3. adenine
  4. a pyrimidine
3.

Prokaryotes contain a ________chromosome, and eukaryotes contain ________ chromosomes.

  1. single-stranded circular; single-stranded linear
  2. single-stranded linear; single-stranded circular
  3. double-stranded circular; double-stranded linear
  4. double-stranded linear; double-stranded circular
4.

DNA replicates by which of the following models?

  1. conservative
  2. semiconservative
  3. dispersive
  4. none of the above
5.

The initial mechanism for repairing nucleotide errors in DNA is ________.

  1. mismatch repair
  2. DNA polymerase proofreading
  3. nucleotide excision repair
  4. thymine dimers
6.

A promoter is ________.

  1. a specific sequence of DNA nucleotides
  2. a specific sequence of RNA nucleotides
  3. a protein that binds to DNA
  4. an enzyme that synthesizes RNA
7.

Portions of eukaryotic mRNA sequence that are removed during RNA processing are ________.

  1. exons
  2. caps
  3. poly-A tails
  4. introns
8.

The RNA components of ribosomes are synthesized in the ________.

  1. cytoplasm
  2. nucleus
  3. nucleolus
  4. endoplasmic reticulum
9.

How long would the peptide be that is translated from this MRNA sequence: 5'-AUGGGCUACCGA-3'?

  1. 0
  2. 2
  3. 3
  4. 4
10.

Control of gene expression in eukaryotic cells occurs at which level(s)?

  1. only the transcriptional level
  2. epigenetic and transcriptional levels
  3. epigenetic, transcriptional, and translational levels
  4. epigenetic, transcriptional, post-transcriptional, translational, and post-translational levels
11.

Post-translational control refers to:

  1. regulation of gene expression after transcription
  2. regulation of gene expression after translation
  3. control of epigenetic activation
  4. period between transcription and translation
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