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Bio 219 Exam 2 – Questions & Solutions – Graded A+
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Bio 219 Exam 2 – Questions & Solutions – Graded A+True or False: Every cell of your personal organism has the same genome (at
least 99.999% identical). Right Ans - true
True or False: The entire genome codes for protein products. Right Ans -
false
Which of these molecules is the "recipe" for protein production?
A. DNA
B. RNA
C. Protein
D. Lipids Right Ans - A. DNA
Which of these is an exception to the "one gene, one enzyme" hypothesis?
A: Not all proteins are enzymes.
B: Not all RNAs code for proteins.
C: Sometimes RNAs are alternatively spliced, so one gene could code for
slightly different proteins.
D: All of these are possible
E: I need help. Right Ans - D: All of these are possible
What kind of mutation occurs when a nucleotide is added or deleted within
the code?
A: Missense
B: Nonsense
C: Frameshift
D: Silent
E: I need help. Right Ans - C: Frameshift
Where are the covalent bonds in DNA?
A: Between bases of 2 different strands
B: Between hydroxyls and phosphates of 2 different nucleotides
E: I need help. Right Ans - B: Between hydroxyls and phosphates of 2
different nucleotides
, True or False: Purine bases always pair with Pyrimidine bases in DNA
Right Ans - true
Which of these best describes a nucleosome?
A: 8 proteins ionically interacting with 150bp of DNA.
B: 4 proteins ionically interacting with 150bp of DNA.
C: 8 proteins covalently bonded with 150 bp of DNA.
D: 8 proteins ionically bonding with 75bp of DNA.
E: I need help. Right Ans - A: 8 proteins ionically interacting with 150bp of
DNA
Which of these describes compact DNA that is hard to transcribe?
A: Heterochromatin
B: Euchromatin
C:
D:
E: I need help. Right Ans - A: Heterochromatin
Which of these is bound to a histone when it is imported into the nucleus?
A: Importin only
B: Importin + Ran-GTP
C: Exportin only
D: Exportin + Ran-GTP
E: I need help. Right Ans - A: Importin only
What would happen if the GEF for Ran-GTP was missing or nonfunctional?
A: Proteins would be stuck in the cytoplasm
B: Proteins would be stuck in the nucleus
C: Proteins would continuously cycle between the nucleus and cytoplasm
D: Proteins would be degraded
E: I need help. Right Ans - B: Proteins would be stuck in the nucleus
RNA is produced by which of the following?
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