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BIO 103 Molecular Genetics Unit Quiz

Question # 00272765
Subject: Biology
Due on: 05/05/2016
Posted On: 05/05/2016 02:52 AM

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Molecular Genetics Unit Quiz
Question 1 Select one answer. 10 points Is the following statement true of prokaryotic cells, eukaryotic cells or both? Multiple genes can be transcribed together into a single mRNA.
  1. Prokaryotic
  2. Eukaryotic
  3. Both prokaryotic and eukaryotic
Question 2 Select one answer. 10 points In an expression plasmid, the origin of replication: _________________
  1. is responsible for the replication of mRNA.
  2. Is the position where the base number begins at 1.
  3. allows for growth of plasmid containing bacteria in the presence of antibiotics.
  4. allows the bacteria to duplicate the plasmid.
Question 3 Select one answer. 10 points

The correct decoding of the following encrypted message: PQRMNO is?

Key(MNO = h PQR = i)

  1. hi
  2. ih
Question 4 Select one answer. 10 points Which of the following terms refers to a region of a chromosome that has a specifiic function?
  1. Allele
  2. Gene
  3. Genotype
  4. DNA
Question 5 Select one answer. 10 points The DNA sequence of the expression plasmid adjacent to the ribosome binding site is:

---GGATCCATCTGCGAATTC----

---CCTAGGTAGACGCTTAAG---

It contains a BamH1 site (G^GATCC) and a EcoR1 site (G^AATTC). In order for the synthetic gene to be inserted between these two sites, it should be constructed to have which restriction sites at its beginning and at its end?

  1. EcoR1, followed by BamH1.
  2. BamH1, followed by BamH1.
  3. EcoR1, followed by EcoR1.
  4. BamH1, followed by Eco R1.
Question 6 Select one answer. 10 points A codon in the middle of an mRNA strand was mutated from UGU to UGA. What type of mutation is this?
  1. frame shift
  2. missense
  3. nonsense
  4. silent
Question 7 Select one answer. 10 points Replication of each strand occurs in which direction.
  1. opposite
  2. same
Question 8 Select one answer. 10 points When producing a protein from a gene on DNA, the first process to occur must be
  1. translation
  2. replication
  3. mutation
  4. transcription
Question 9 Select one answer. 10 points Which DNA sequences must a synthetic gene contain in order for the gene to be inserted into the expression plasmid?
  1. Ribosome binding site.
  2. Lac operator.
  3. Restriction enzyme sites.
  4. DNA ligase sites.
  5. Origin of replication.
Question 10 Select one answer. 10 points Is the following statement true of prokaryotic cells, eukaryotic cells or both? One gene can encode multiple different proteins (different in amino acid sequence).
  1. Prokaryotic
  2. Eukaryotic
  3. Both prokaryotic and eukaryotic
Question 11 Select one answer. 10 points During cell division, the chromosomal DNA becomes
  1. more condensed
  2. less condensed
  3. there is no change in the condensation level.
Question 12 Select one answer. 10 points Which of these is not used in DNA replication?
  1. Primer
  2. RNA polymerase
  3. DNA polymerase
  4. Helicase
Question 13 Select one answer. 10 points A gene codes for a protein that is 500 amino acids long. Which of the following mutations is likely to be the most deleterious?
  1. a nonsense mutation at the fifth codon
  2. a missense mutation at the fifth codon
  3. a missense mutation at the 490th codon
  4. a nonsense mutation at the 490th codon
Question 14 Select one answer. 10 points The difference between the genome of an organism and the epigenome is: _____________________
  1. The epigenome refers to changes in DNA expression due to changes in DNA packaging.
  2. nothing, both terms refer to the genetic content of an organism
  3. The accumulation of mutations in the DNA sequence.
Question 15 Select one answer. 10 points Assuming that the genes required for Isoleucine (an amino acid) biosynthesis are contained within an operon. If the cell is grown in the presence of high amounts of isoleucine you would expect to find:
  1. The repressor protein released from the operator, allowing transcription.
  2. The repressor protein released from the operator, preventing transcription.
  3. The repressor protein to bind to the operator, preventing transcription.
  4. The repressor protein to bind to the operator, allowing transcription.

Tags quiz unit genetics molecular select answer points gene mutation prokaryotic protein replication following bamh1 operator plasmid expreion repreor followed site codon sites transcription cells eukaryotic ecor1 miense amino nonsense mrna refers terms 490th epigenome

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