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Concepts of Biology

Review Questions

Concepts of BiologyReview Questions


Which of the following does cytosine pair with?

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

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

DNA replicates by which of the following models?

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

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

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

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

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

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

The RNA components of ribosomes are synthesized in the ________.

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

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

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

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

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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