Question 38 (1 point) Ethidium bromide, a chemical often used in the lab to visu

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Question 38 (1 point)

Ethidium bromide, a chemical often used in the lab to visualize DNA on a gel, is an example of a(n)

Question 38 options:

Deaminating agent

Alkylating agent

Intercalating agent

Hydroxylating agent

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Question 39 (1 point)

Which of the following is used in PCR?

Question 39 options:

heat-stable polymerase

primers specific to your gene of interest

dNTPs

template DNA strand

all of the above are used

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Question 40 (1 point)

In one PCR cycle, the correct order of steps is

Question 40 options:

Primer annealing, primer extension, denaturation

Primer annealing, denaturation, primer extension

Denaturation, primer annealing, primer extension

Denaturation, primer extension, primer annealing

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Question 41 (1 point)

During dideoxy sequencing, addtion of a _____ results in chain elongation, while addtion of a _____ results in chain termination.

Question 41 options:

dNTP, ddNTP

ddNTP, dNTP

ddNTP, dddNTP

dddNTP, ddNTP

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Question 42 (1 point)

Dideoxynucleotides are missing:

Question 42 options:

The hydroxyl group attached to the 2' carbon

The hydroxyl group attached to the 3' carbon

The phospate groups attached to the 5' carbon

The base attached to the 1' carbon

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Question 43 (1 point)

According to the endosymbiont hypothesis, mitochondria and chloroplasts may be descendants of prokaryotes engulfed by early eukaryotes.

Question 43 options:

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Question 44 (1 point)

Assume that lzy is a trait characterized by a lack of energy and it results from a mutation in a gene found only in the mitochondrial DNA. A woman who shows normal energy mates with a man who shows lzy, what proportation of their children (male and female) will show normal energy??

Question 44 options:

1/2 of the males and 1/2 of the females

all males and 1/2 of the females

none of the males and all of the females

none of the males and none of the females

all of the males and all of the females

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Question 45 (1 point)

In a given population of dogs, the frequency of being homozygous recessive for fur color (assuming Hardy-Weinberg equilibrium) is 0.09. What is the frequency of being heterozygous for fur color in this population?

Question 45 options:

0.21

0.3

0.42

0.7

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Deaminating agent

Alkylating agent

Intercalating agent

Hydroxylating agent

Explanation / Answer

Question 38

Ethidium bromide, a chemical often used in the lab to visualize DNA on a gel, is an example of a(n)

Intercalating agent

Ethidium bromide is an intercalating agent, binds strongly to the double strand DNA molecules

Question 39

Which of the following is used in PCR?

all of the above are used

Question 40

In one PCR cycle, the correct order of steps is  

Denaturation, primer annealing, primer extension

Question 41

During dideoxy sequencing, addtion of a _____ results in chain elongation, while addtion of a _____ results in chain termination.  

dNTP, ddNTP

Question 42 Unsaved

Dideoxynucleotides are missing:

The hydroxyl group attached to the 3' carbon

Dideoxynucleotides, are nucleotides lacking a 3'-hydroxyl (-OH) group on their deoxyribose sugar.

Question 43

According to the endosymbiont hypothesis, mitochondria and chloroplasts may be descendants of prokaryotes engulfed by early eukaryotes.

   True

There is compelling evidence that mitochondria and chloroplasts were once primitive bacterial cells which over the course of time became part of eukaryotic system.

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