Question

In combinatorial transcriptional regulation, expression of a particular gene in a specific cell type is controlled by

Select one:

a. the combination of enhancers present in that cell type.

b. the combination of transcription factors present in that cell type.

c. the requirement of the gene for the cell’s function.

d. the presence or absence of RNA polymerase in the cell.

In eukaryotic genes, enhancer sequences are usually found

Select one:

a. close to the promoter region of the gene.

b. close to or distant from the promoter region of the gene.

c. within the promoter of the gene.

d. within the operator of the gene.

The ATP7B gene is required to transport the potentially toxic nutrient copper from liver cells into the bile for excretion. Regarding ATP7B transcriptional regulation, which one of the following would be predicted?

Select one:

a. ATP7B would normally be expressed in the liver and its transcription would be decreased by high dietary copper levels.

b. ATP7B would normally be expressed in all tissues and its transcription would be increased by high dietary copper levels.

c. ATP7B would normally be expressed in the liver and its transcription would be increased by high dietary copper levels.

d. ATP7B would normally be expressed in all tissues and its transcription would be decreased by high dietary copper levels.

To ensure that mRNA is translated in the correct reading-frame, the ribosome recognises which one of the following?

Select one:

a. The promoter sequence in the mRNA molecule

b. The first three bases at the 3' end of the mRNA molecule

c. The first three bases at the 5' end of the mRNA molecule

d. The first AUG sequence in the mRNA molecule

One codon for asparagine has the sequence 5’ AAC 3’. What is the sequence of the anticodon on the corresponding aminoacyl-tRNA for asparagine?

Select one:

a. 5’ GUU 3’

b. 5’ CAA 3’

c. 5’ GGA 3’

d. 5’ UUG 3’

Answer 1

ans- b)

ans- b)

ans- c)

ans- a)

ans- a)