Question

PLEASE ANSWER ALL THE QUESTIONS:

1.What is true of tRNA (transfer RNA)?

A

they contain an anti-codon

B

they carry an amino acid

C

they can interpret the genetic code

D

all of these are true

2. How can transcription factors bound to distant enhancers influence gene expression?

A

the transcription factors can slide along the DNA until they get to the gene's promoter

B

DNA can loop, bringing these proteins into contact with the gene's promoter

C

both of these are true

D

neither of these are true

3. How many different three-letter codons can be made from four types of nucleotides?

A

12

B

16

C

32

D

64

4. What's the difference between a transgenic organism and Genetically Modified Organism?

A

a transgenic organism is produced by older recombinant DNA techniques, while a GMO is produced by CRISPR

B

a transgenic organism is always an animal, a GMO is always a plant

C

there is no difference. these are two terms for the same thing.

5. You wanted to express green fluorescent protein (GFP) in zebrafish to make them glow. You should fuse:

A

the GFP promoter with a zebrafish coding sequence

B

a zebrafish promoter with the GFP coding sequence

C

the GFP promoter with a zebrafish enhancer

D

a zebrafish promoter with a GFP enhancer

6. A valid concern when choosing between non-GMO and GMO food products is that:

A

GMO food generally has fewer vitamins, so it is less healthy

B

GMO crops are associated with increased use of herbicides

C

both of these are true

D

neither are true

7. According to the video, performing CRISPR requires:

A

access to a scientific laboratory

B

RNA

C

cutting the DNA double helix

D

all of these things

8. CRISPR is used mainly...

A

in human medicine, to treat genetic disorders

B

in basic scientific research, to learn more about genes

C

to create designer babies

9. Terminator seeds are a potential (but unpopular) solution to which problem?

A

loss of crops due to insect infestations

B

infection of plants by viruses

C

gene flow between GMO and non-GMO crops

10. According to the video, what is harmful to insects but not to us? Choose all that apply!

A

coffee

B

chocolate

C

BT toxin

11. By engineering plants that can capture their own ____, crops would be less dependent on treatment with chemicals that contribute to global warming.

A

carbon

B

oxygen

C

nitrogen

D

phosphorous

12. A mutation within the promoter region of a gene is likely to:

A

alter the amino acid sequence of the protein that is eventually produced from the gene

B

alter the amount of transcription of the gene

C

both of these

D

neither of these

13. What is the 'flow of information' during gene expression?

A

protein –> DNA –> RNA

B

RNA –> protein –> DNA

C

DNA –> RNA –> protein

D

protein –> RNA –> DNA

14. How many amino acids can be encoded by the DNA sequence AAACTGTACGGG ?

A

12

B

6

C

4

D

3

15. Some humans are able to digest milk into adulthood, but others are not. This is because:

A

some of us have a lactase gene; others do not

B

some of us have a lactase allele that produces a lactase protein with a different (better) amino acid sequence

C

some of us have a regulatory mutation that allows lactase to be expressed past childhood

D

some of us have a mutation in the lactase coding region that produces an early STOP codon

16.

According to the video above, what is the main obstacle in making silk from goat milk?

A

The transgenic goats are not healthy and do not survive to adulthood.

B

The transgenic goats do not produce the silk protein.

C

It is difficult to purify the silk protein from goat milk.

D

It is difficult to spin the silk protein into silk threads.

17. Who in this scenario qualifies as transgenic? The bacteria? The cow?

A

the bacteria

B

the cow

C

both

18. What is true of CRISPR?

A

it is a genome editing technique

B

it is based on a bacterial genome defense system

C

it holds promise for human gene therapy

D

all of these

19. What is true of GM (genetically modified) corn?

A

it is less nutritious than non-GM corn

B

it is less flavorful than non-GM corn

C

it is less genetically diverse than non-GM corn

Answer 1

1. Option D is correct.- All of these are true

Explanation: They carry an amino acid and with their anti codon stem they bind to the specific codon on mRNA .

2. Option c is correct Both of these are true.

Explanation: When transcription factors bind at distant position from promoter, it is found that DNA loops to bring distantly bound transcription factors and mediator protein or promoter site  close to each other.

3. Option D is right -64

Four letters (A T G C) can combine among them to form a three letter product maximally in 64 ways 4³= 64.

4. Option C is correct.

Explanation: There is no difference between transgenic crop and GMO.

5. Option B is correct - a Zebrafish promoter with the GFP coding sequence.

Explanation: If a Zebrafish promoter become tagged with GFP coding sequence, then GFP protein will be expressed in Zebrafish.

According to CHEGG guideline, i have answered first four objective type questions. I have also answered one extra. Please post 4 questions maximum in post. thank you.