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					CST Review Questions
   The Chemistry of DNA and
      Molecular Genetics
             Question 1
The diagram below represents a portion of a nucleic
  acid molecule. The part indicated by arrow X could
  be

      1. adenine.
      2. ribose.
      3. deoxyribose.
      4. phosphate.
               Question 2

The molecule coded
directly from DNA is
represented by number

    1.   1
    2.   2
    3.   3
    4.   4
               Question 3
What is an example of a molecule produced by this
 type of process?

   1. glucose
   2. glycogen
   3. a fatty acid
   4. a protein
              Question 4
A mutation may occur in a gene as a result of the

1.   synthesis of a
     spindle apparatus.
2. loss of a nucleotide.
3. loss of a nucleolus.
4. replication of
     centromeres.
              Question 5
Which organelle in the diagram below represents
an exception to the cell theory because it contains
genetic material and can reproduce within the cell?

     1.   A
     2.   B
     3.   C
     4.   D
              Question 6
The diagram below represents a portion of a
chromosome of a fruit fly.

What would most likely be located at area A?

      1. centrioles
      2. spindle fibers
      3. nucleolus
      4. nucleic acid
                Question 3
                Question 7
The structure and location of a cellular component is represented
  in the diagram below. The polymer in the diagram most likely
  contains




               1. adenosine triphosphate.
               2. lipids.
               3. genes.
               4. hydrolytic enzymes.
     Question 3
     Question 8
Which processes occur in the nucleus?

          1. 1 and 2
          2. 2 and 3
          3. 3 and 4
          4. 4 and 5
Question 9
Process 1 is known as

  1. replication
  2. mutation
  3. nondisjunction
  4. translocation
            Question 10
What is the product of process 3?

         1. a strand of DNA
         2. two complementary strands of DNA
         3. a strand of RNA
         4. a chain of amino acids
              Question 11
If an adenine nucleotide is deleted from a nucleotide
   sequence in a DNA molecule, the result is a

                   1. clone
                   2. mutation
                   3. polypeptide
                   4. hybrid
           Question 12
One strand of DNA could be as long as a
 football field if it were stretched out
 lengthwise. One of the factors allowing DNA
 to fit inside the nucleus of a cell is its ability
 to
     1. break apart into separate genes.
     2. extend to form very long, thin
        molecules.
     3. coil tightly around associated proteins.
     4. denature from the effect of an enzyme.
          Question 13
In an experiment, the height of several plants
  was recorded daily in millimeters. Which tool
  would be the most accurate and appropriate
  for this measurement?
          1. Digital scale
          2. Graduated cylinder
          3. Yardstick
          4. Metric ruler
               Question 14
The diagram below shows a strand 3 of DNA matched to a strand
     of messenger RNA. What process does this diagram
     represent?



1. mutation
2. respiration
3. transcription
4. translation
          Question 15
Why is the particular sequence of bases in a
  segment of DNA important to cells?

        1. Some base sequences code for
           protein production.
        2. Some base sequences cause the
           release of lipids from the nucleus.
        3. Some base sequences contain the
           order of sugars in polysaccharides.
        4. Some base sequences produce
           electrical signals sent to the
           cytoplasm.
           Question 16
A rare genetic condition causes 30 dwarfism
    and immunodefi ciencies. Which of the
    following is the most likely cause of this
    condition?

           1. a parasitic infection
           2. a mutation in DNA
           3. a bacterial disease
           4. an excess of ATP
          Question 17
The weakest bonds in a double-stranded
  molecule of deoxyribonucleic acid exist
  between the

          1. deoxyribose sugars.
          2. phosphate groups.
          3. nitrogenous bases.
          4. 5-carbon sugars.
         Question 18
The types of enzymes produced in a cell
  are regulated by the

    1. order of nucleotides in DNA
       molecules.
    2. shape of DNA molecules.
    3. size of nucleotides in DNA
       molecules.
    4. location of DNA molecules.
            Question 19
Molecules C, D, and E
 will combine to form
 part of

  1. a polypeptide.
  2. a polysaccharide.
  3. DNA.
  4. RNA.
             Question 20
Structure B represents a
  molecule of

      1. nuclear DNA.
      2. cytoplasmic DNA.
      3. ribosomal RNA.
      4. transfer RNA.
            Question 21
How many codons are
  located on the messenger
  RNA molecule in the
  diagram?

     1. 1
     2. 6
     3. 3
     4. 9
            Question 22
The type of molecule
  represented at A is
  synthesized according
  to a template found in

      1. DNA.
      2. RNA.
      3. dipeptides.
      4. amino acids.
                Question 23
One similarity between DNA and
    messenger RNA molecules is
    that they both contain

      1. the same sugar.
      2. genetic codes based on
         sequences of bases.
      3. a nitrogenous base
         known as uracil.
      4. double-stranded
         polymers.
           Question 24
DNA replicates through a process called

    1.   dispersive replication.
    2.   semidisperive replication.
    3.   conservative replication.
    4.   semiconservative replication.
           Question 25
When DNA replication occurs, the enzyme
  which separates the two sides of the
  helix is called

      1.   DNA polymerase.
      2.   DNA amylase.
      3.   DNA ligase.
      4.   DNA helicase.
         Question 26
The enzyme which bonds new
  nitrogenous bases to those existing
  on the original DNA strand is called

      1. DNA polymerase.
      2. DNA amylase.
      3. DNA ligase.
      4. DNA helicase.
           Question 27
Okazaki fragments are formed because

  1. DNA polymerase can only create a new strand of
     DNA from the 5' end to the 3' end.
  2. DNA polymerase can only create a new strand of
     DNA from the 3' end to the 5' end.
  3. newly formed DNA tends to break apart easily
     into fragments.
  4. DNA helicase sometimes inadvertently breaks
     the DNA.
            Question 28
One important difference between DNA replication in
   prokaryotes and eukaryotes is that

   1. prokaryotes do not use enzymes in the
      replication process
   2. there is only one replication origin in
      prokaryotes
   3. there are no Okazaki fragments in prokaryotes
   4. replication is conservative, not
      semiconservative, in prokaryotes
          Question 29
Which of the following must happen first in
 order for DNA replication to occur?
  1. DNA polymerase binds to the leading
     strand
  2. DNA is unwound
  3. Hydrogen bonds form between bases
  4. Chromosomes condense
        Question 30
A nucleotide consists of
  1. a nitrogen base.
  2. a nitrogen base and a sugar.
  3. a nitrogen base, sugar, and
     phosphate.
  4. two nitrogen bases, a sugar, and a
     phosphate.
          Question 31
The "rungs" of the DNA ladder are made
 of
     1.   phosphates & bases.
     2.   sugars.
     3.   sugars & phosphates.
     4.   bases.
           Question 32
A DNA strand has the following bases:
              A A G C C A.
What are the bases on its complimentary
   strand?

      1.   AAGCCA
      2.   ACCGAA
      3.   TTCGGT
      4.   CCATTC
          Question 33
When onion cells are observed with a
 compound light microscope, which
 laboratory technique is used to make the
 nucleus more visible?

          1. centrifugation
          2. chromatography
          3. microdissection
          4. staining
          Question 34
A student is investigating the internal organs
  of an earthworm. Which piece of equipment
  should the student use to move the intestine
  aside without damaging it?

       1. a glass slide
       2. a metric ruler
       3. a dissecting needle
       4. a dropping pipette
                    3
           Question 35
What is the volume of water in the graduated
 cylinder shown below?

     1. 10.3 mL
     2. 13.0 mL
     3. 13.5 mL
     4. 14.0 mL
                     3
            Question 36
Which piece of laboratory equipment should a student
 use to remove the legs of a preserved grasshopper
 for further study?

				
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