Nitrogenase, a complex metal containing enzyme is involved in conversion of N2 to NH3•

a. Nitrogenase is composed of two component proteins

b. Nitrogenase is a complex consisting of the MoFe protein (dinitrogenase or component I) a heterotetramer

c. Nitrogenase is a complex consisting of the MoFe protein (dinitrogenase or component I) a heterotetramer

d. Fe protein (dinitrogenase reductase or component II) a heterodimer

Which of the combination of above statement about Nitrogenase is INCORRECT

#Question id: 4403

#Unit 3. Fundamental Processes

 Which of the following does (do) not require a DNA helicase activity?

a. SWI/SNF function  b. Pol II open-complex formation

c. transcription-factor binding to DNA

d. deacetylation of histone tails

#Question id: 4404

#Unit 3. Fundamental Processes

The yeast two-hybrid system can be used to identify

a. proteins that interact with a known or “bait” protein.

b. proteins that interact with a “fish” domain.

c. cDNAs that encode interacting proteins.

d. co-activators and co-repressors.

#Question id: 4405

#Unit 3. Fundamental Processes

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: 4406

#Unit 3. Fundamental Processes

An electrophoretic mobility shift assay (EMSA) was conducted to check for the binding of TFIIB to a segment of a DNA promoter region. Which of the following approaches could be used to confirm that TFIIB is indeed binding?

#Question id: 4407

#Unit 3. Fundamental Processes

The general transcriptional factors are used by all sets of RNA Polymerase. Which of the following GTF is/are commonly used by all RNA Polymerases?

A. TBP

B. TFIID

C. TFIIIC

D.TFIIE

E. TFIIH

#Question id: 4408

#Unit 3. Fundamental Processes

an example/s of in vivo “molecular mimicry” is/are

I. EF-G–GDP and EF-Tu–GTP–tRNA

II. TAF42 -TAF62 and H3.H4 tetramer

III. Tyrosinyl-tRNA and Puromycin