Pre lectures n post lecturequiz

 Incorrect

Question 1

0 / 1 pts

The diagram shows synthesis of DNA at a replication fork.

 

Based on the diagram above, the newly synthesized DNA strand labeled D> B is the:

  

template strand

 

  

non-template strand

 

  

lagging strand

 

  

leading strand

 

  

okazaki fragment

 

  

DNA primer

 

 

Question 2

1 / 1 pts

In the diagram from Question 1 (pasted below again), which ends of the newly synthesized DNA is/are likely to contain primers?

  

D and C

 

  

B and E

 

  

D and E

 

  

D, B, C, and E

 

  

E alone contains the primer

 

 

Question 3

1 / 1 pts

Building off Question 2, the primers you chose are made up of...

  

DNA

 

  

RNA

 

  

none of the above

 

  

No answer text provided.

 

 

IncorrectQuestion 4

0 / 1 pts

Given the strand 5' - GATCAA - 3', which of the following is the correct complementary strand? (Hint: pay special attention to 5' and 3' direction here).

  

5' - CTAGTT - 3'

 

  

3' - TTGATC - 5'

 

  

3' - AACTAG - 5'

 

  

5' - TTGATC - 3'

 

  

5' - CTAGTA - 3'

 

 

Question 5

1 / 1 pts

The sequence of an mRNA is 5' - AUG GGG AAC AGC AAG - 3'.

What is the sequence of the corresponding coding (non-template) DNA strand?

  

3' - ATG GGG AAC AGC AAG - 5'

 

  

5' - ATG GGG AAC AGC AAG - 3'

 

  

3' - AUG GGG AAC AGC AAG - 5'

 

  

3' - TAC CCC TTG TCG TTC - 5'

 

  

5' - TAC CCC TTG TCG TTC - 3'

 

 

Please use the Amino acid - Codon chart below to answer questions related to translation:

 

IncorrectQuestion 6

0 / 1 pts

Gene expression includes which of the following?

  

DNA replication

 

  

replicaton, translation, transcription

 

  

transcription and translation

 

  

translation

 

 

Question 7

1 / 1 pts

Use the following DNA sequence and the genetic code to answer the next 3 questions.     

DNA template:  3' - TT TAC AAG ACC CGA CAT ATC - 5'

 

The mRNA sequence would be...

  

5' - AAATGTTCTGGGCTGTATAG - 3''

 

  

5' - AAAUGUUCUGGGCUGUAUAG - 3'

 

  

5' - UUUACAAGACCCGACAUAUC - 3'

 

  

5' - TTTACAAGACCCGACATATC - 3'

 

 

Unanswered

Question 8

0 / 1 pts

DNA template:  3' - TT TAC AAG ACC CGA CAT ATC - 5'

 

If a mutation occurred that resulted in the underlined base being changed to a T, it would be an example of a _____________ mutation. 

 

  

Missense

 

  

Nonsense

 

  

Frameshift

 

  

Silent

 

 

Unanswered

Question 9

0 / 1 pts

DNA template:  3' - TT TAC AAG ACC CGA CAT ATC - 5'

 

If the same underlined base is removed from the DNA sequence, there would be...

 

a drastic effect due to a new stop codon being introduced

  

a large effect since it is a frameshift mutation

 

  

no change to the phenotype

 

 

a small effect on the phenotype since only one amino acid would change

 

Not enough information is given to answer this question

 

Unanswered

Question 10

0 / 1 pts

Suppose that the sequence of an anticodon is 5' - CUG - 3' . With which codon(s) can it pair?

  

5' - GAC - 3'

 

  

5' - GAU - 3'

 

  

5' - CAG - 3'

 

  

5' - CAU - 3'

 

  

5' - CAA - 3'

 

 

Unanswered

Question 11

0 / 1 pts

Predict the effect of a mutation in the –35 region of a bacterial promoter.

 

The mutation interferes with sigma factor binding, the RNA polymerase does not bind to the promoter

 

The mutation interferes with sigma factor binding, the DNA polymerase does not bind to the promoter

 

The mutation changes sigma factor binding, the RNA polymerase binds more tightly to the promoter

 

The mutation changes sigma factor binding, the DNA polymerase binds more tightly to the promoter

 

The mutation changes sigma factor binding, the ribosome binds more tightly to the promoter

 

Unanswered

Question 12

0 / 1 pts

A frameshift mutation that occurs later in a gene as opposed to early in a gene is more deleterious (i.e. has a more severe effect on the function of the gene).

  

True

 

  

False

 

 

Unanswered

Question 13

0 / 1 pts

Which of the following refers to the mechanism of horizontal gene transfer is commonly responsible for the spread of antibiotic resistance genes within a bacterial population in the real world (i.e. not in lab)?

Note an R plasmid is a plasmid containing antibiotic resistance.

Sp25 update: sorry this content will come up in Week 6!

  

transduction of R plasmids

 

  

transformation of R plasmids

 

  

conjugation of R plasmids

 

 

Unanswered

Question 14

0 / 1 pts

How does the overuse of antibiotics in animal feed influence the emergence of drug-resistant strains of bacteria? 

 

Antibiotics cause mutations in bacterial DNA that create new drug-resistant strains

 

Antibiotics exert selective pressure on bacterial populations, allowing existing drug-resistant strains to reproduce

 

Overuse of antibiotics has no effect on the emergence of drug-resistant strains

 

Antibiotics provide nutrition to drug-resistant strains that consume them

 

Unanswered

Question 15

0 / 1 pts

Cells are always producing proteins from every gene they possess.

  

True

 

  

False

 

 

Unanswered

Question 16

0 / 1 pts

Each codon within the genetic code encodes a different amino acid.

  

True

 

  

False

 

 

Unanswered

Question 17

0 / 1 pts

Take a look at the following diagram:

 

What do you expect to happen if a dideoxynucleotide (ddNTP) is added to a growing strand of DNA? Think about what the 3' OH (hydroxyl) is needed for in DNA synthesis to answer this question.

 

The nucleotide is added and DNA synthesis continues

 

The nucleotide cannot be added to the growing strand of DNA

 

The nucleotide is added and DNA synthesis halts (stops)

  

The nucleotide is added and causes a mutation

 

 

Unanswered

Question 18

0 / 2 pts

A mutation happened during DNA replication and it was not corrected.

The mutation is an incorporation of the base Cinstead of A in one of the DNA strands. After one round of replication, two daughter DNA molecules were generated from the original DNA template: one with the original DNA sequence (A/T) and one with the mutated sequence (C/T), as shown below:

If there is another round of DNA replication for each of the daughter strands above, there are now [ Select ] "granddaughter" DNA molecules. Of those, [ Select ] have inherited the mutation.

 

Answer 1:

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Answer 2:

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