Which of the following can occur when steroid hormone binds to its cognate receptor?

a. conformational changes in the receptor

b. translocation of the receptor out of the cell membrane

c. binding of the receptor to DNA response elements

d. stimulation of transcription

#Question id: 4255

#Unit 3. Fundamental Processes

How might a single base substitution in the sequence of a gene affect the amino acid sequence of a protein encoded by the gene?

#Question id: 4257

#Unit 3. Fundamental Processes

An original section of DNA has the base sequence AGCGTTACCGT. A mutation in this DNA strand results in the base sequence AGGCGTTACCGT. What type of mutation does this change represent?

#Question id: 4258

#Unit 3. Fundamental Processes

A single base substitution mutation is likely to have a less deleterious effect when the base change exhibits which of the following results?

#Question id: 4259

#Unit 3. Fundamental Processes

Rank the following one-base point mutations with respect to their likelihood of affecting the structure of the corresponding polypeptide (from most likely to least likely).

1. insertion mutation deep within an intron

2. substitution mutation at the third position of a codon in an exon

3. substitution mutation at the second position of a codon in an exon

4. deletion mutation within the first exon of the gene

#Question id: 4260

#Unit 3. Fundamental Processes

Which of the following occur(s) when the eukaryotic translational machinery encounters the TAG codon?

#Question id: 4261

#Unit 3. Fundamental Processes

Polyadenylation can promote translation

a. of the fragile-X gene.                     

b. of stored oocyte mRNAs.

c. by allowing for greater interaction at the 5´ end.

d. by allowing for greater interaction with translation initiation factors.