Cytokinin signals to nuclear-localized response regulators  by transferring the phosphate group to an aspartate on the receiver domain of the ARR. The ARR response regulators are encoded by multigene families, They fall into two basic classes:

I) Type-A ARRs

II)Type-B ARRs

a) The products of which are made up solely of a receiver domain

b) Receiver domain also include an output domain containing DNA-binding  transcription activation sites

c) Which negatively regulate cytokinin signaling by interacting with other proteins in a manner dependent on the phosphorylation state

d) Which are activated by phosphorylation, which enables them to regulate the transcription of a set of target genes

e) Which are targeted by F-box proteins called KISS ME DEADLY (KMD) proteins negatively regulates the cytokinin response

Which of the following are the correct explanation of the given ARRs types  classes of response regulator?

#Question id: 2807

#Unit 2. Cellular Organization

Huntington’s disease is an example of

a. an autosomal recessive disorder.    b. an autosomal dominant disorder.

c. a sex linked recessive disorder.      d. a sex linked dominant disorder.

#Question id: 2808

#Unit 2. Cellular Organization

A microsatellite is a type of polymorphism that

a. results from the change of a single nucleotide.

b. changes the recognition sequence for a restriction enzyme.

c. results from a variable number of repetitive sequences.

d. results from a chromosomal inversion.

#Question id: 2809

#Unit 2. Cellular Organization

In the human genome, one centimorgan or a 1 percent recombination frequency represents, on average, a distance of about

#Question id: 2810

#Unit 2. Cellular Organization

Which of the following steps is required to generate a knockout mouse?

a. microinjection of DNA into the pronucleus of a fertilized mouse egg

b. introduction of DNA into mouse embryonic stem cells

c. selection for cells containing the gene targeted insertion

d. expression of Cre protein during embryonic development

#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.