Cell Biology and Genetics Questions and Correct Answers.

Exam 3- Chapters 12-15
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Comment:Hi Claudia
Exam 3 is complete. Please let me know if you have any
questions.
thanks
Professor Harrell

Part 1 of 1 ­ 100.0 Points

Question 1 of 40
2.5 Points
Nondisjunction during meiosis I will result in ________.




A. n




B. n­1




C. n+1




D. n+1 and n­1




E. n, n­1, and n+1




Feedback:Learning Objective: Explain how nondisjunction leads to disorders in chromosome
number
Question 2 of 40
2.5 Points
Which is likely to disrupt the function of the most genes: a 500kb deletion, a 500kb inversion, or a 500kb
translocation?

, 

A. Deletion




B. Inversion




C. Translocation




Feedback:The deletion will disrupt all the genes contained within it, but the inversion and translocation will
likely only affect the genes on the ends.
Question 3 of 40
2.5 Points
There are a number of unique features to eukaryotic pre­mRNA splicing. Select all that apply.


A. Introns are thought to encode specific subunits of proteins.


B. Introns likely slow down gene expression.


C. Introns need to be removed precisely to prevent mutations.


D. There are often multiple introns in a gene.

Feedback:Learning Objective: Understand the significance of exons, introns, and
splicing
Question 4 of 40
2.5 Points
Which amino acid can sometimes be present at the P site without first entering the A site of the ribosome?




A. alanine




B. tryptophan




, C. methionine




D. leucine




Feedback:Learning Objective: Discuss the role of ribosomes in protein
synthesis
Question 5 of 40
2.5 Points
What type of enzyme cuts the pre­mRNA between the AAUAAA consensus sequence and a GU­rich
sequence?




A. exonuclease




B. cleavase




C. endonuclease




D. sequenase




Feedback:Correc
t
Question 6 of 40
2.5 Points
Why is working with linked genes not simple?




A. potential of crossing over in meiosis I


