In which condition, genital ridge to bipotential gonad conversion gene activate the expression of Wnt4 protein and of a small soluble protein called R-spondin1 (Rspo1)? 

#Question id: 2811

#Unit 2. Cellular Organization

RNA interference is a method for inhibiting the function of specific genes using

a. single-stranded DNA.                     

b. double-stranded DNA.

c. single-stranded RNA.                     

d. double-stranded RNA.

#Question id: 2812

#Unit 2. Cellular Organization

Which of the following statements is (are) true of the human genome?

a. 1.5 percent of the genome corresponds to protein coding sequences.

b. The median length of an intron is 10 kb.

c. 10 percent of the genome is transcribed into pre mRNA precursors.

d. Most human exons contain 500–1000 base pairs.

#Question id: 2813

#Unit 2. Cellular Organization

DNA fingerprinting is a technique based on differences in the

a. length of introns.   

 b. number of tandem copies of a simple sequence repeat.

c. number of tandem ribosomal RNA genes.

d. size of protein coding genes.

#Question id: 2814

#Unit 2. Cellular Organization

LINES (long interspersed elements)

#Question id: 2815

#Unit 2. Cellular Organization

Telomerase

a. extends DNA strands during DNA synthesis.

b. has reverse transcriptase activity.

c. is a protein-RNA complex.

d. replicates repetitious DNA located at the centromere.

#Question id: 2816

#Unit 2. Cellular Organization

Which of the following mutations can result in a reduction of β-galactosidase?

a. a mutation in adenylate cyclase

b. a mutation in catabolite activator protein (CAP)

c. a mutation in the CAP site in the lac control region

d. a mutation in the repressor binding site in the operator