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Molecular Biology.

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1.   All of the following are directly involved with translation except:

a.Ribosome's

b.tRNA

c.amino Acids

d.DNA

e.mRNA

2. Carries the anticodon to the ribosome

a.ribosomal RNA

b.tRNA

c.RNA polymerase

d.DNA

e.mRNA

3. A catalytic form of RNA:

a.Ribosomes

b.rRNA

c.RNA polymerase

d.tRNA

e.mRNA

4. Carries the codons from the nucleus

a.Ribosomes

b.tRNA

c.RNA polymerase

d.DNA

e.mRNA

5. What sequence of mRNA can be transcribed from the following DNA coding strand? TACGATCGATTTATT

a.ATGCTAGCTAAATAA

b.UAGCAUGCAUUUAUU

c.AUGCUAGCUAAAUAA

6. How many codons are contained in this mRNA sequences?

a.2

b.3

c.4

d.5

7. If this mRNA is translated into the protein how many amino acids would it contain? (See chart below)

a.2

b.3

c.4

d.5

8.  IF this mRNA is translated into protein what is the sequence of amino acids contained in the resulting polypeptide. (see chart below)

a.Met-Leu-ALa-Lys

b.Tyr-Val-Glu-Lys

c.Met-Leu-ALa-Lys-Tyr

d.Met-His-ALa-Lys-Leu

If a mutation occurs and a G is deleted from the 4th nucleotide position in the above DNA sequence. What would be the sequence of amino acids in the resulting polypeptide after translation?

 

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9.  Which is NOT a major function of the genetic material?

  1. Store information
  2. Catalyze chemical reactions
  3. replicate itself
  4. undergo mutation

10.  One of Chargaff's rules states that

  1. A + T = G + C.
  2. A + G = T + C.
  3. A = G, T = C.
  4. A = C, T = G.

11.   If a species contains 23% adenine A in its DNA, what is the percentage of guanine G would it also contain?

  1. 23%
  2. 46%
  3. 25%
  4. 44%
  5. 27%

12.  The amount of adenine is always equal to the amount of _____ in DNA.

  1. Cytosine
  2. Uralic
  3. guanine
  4. thymine
  5. ATP

13.  A eukaryotic chromosome is made up of:

  1. DNA only
  2. Histones and nucleic acid
  3. Centromeres and centrioles
  4. Loops of naked DNA
  5. DNA and RNA only

14.  Which of the following statements about DNA replication is NOT correct?

  1. Unwinding of the DNA molecule occurs as hydrogen bond break.
  2. Replication occurs as each base is paired with another exactly like it.
  3. The process is known as semi conservative DNA replication because one old strand is conserved in the new DNA molecule.
  4. Complementary base pairs are held together with hydrogen bonds.

15.   Replication of DNA is

  1. semi conservative.
  2. required the unwinding of the double helix.
  3. involves new complementary nucleotides forming base pairs and then joining to form new strands.
  4. All of the choices are correct.

16.  Which of the classes of RNA molecules carries the genetic information as it is needed for the construction of a protein?

  1. ribosomal RNA, rRNA
  2. transfer RNA, tRNA
  3. messenger RNA, mRNA
  4. primary mRNA transcript

17.  Which of the classes of RNA molecules carries the amino acids that are added to the growing polypeptide chain?

  1. ribosomal RNA
  2. transfer RNA
  3. messenger RNA
  4. primary mRNA transcript

18.  Which of the classes of RNA molecules is linked with proteins in forming the large and small subunits of protein synthesis structure?

  1. ribosomal RNA
  2. transfer RNA
  3. messenger RNA
  4. primary mRNA transcript

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