TLS Online TPP Program

#Question id: 2830


The NtrC protein from E. coli
a. is a σ54 RNA polymerase.             
b. stimulates transcription of the glnA gene.
c. is activated by a protein kinase called NtrB.
d. binds both to an enhancer site upstream of the glnA gene and to RNA polymerase.
e. has ATPase activity.

#Unit 2. Cellular Organization
  1. b, c, d, and e  

  2. a, b, c, and d 

  3. c and d

  4. a, d, and e 

More Questions
TLS Online TPP Program

#Question id: 864

#Unit 1. Molecules and their Interaction Relevant to Biology

Which one is not the appropriate function of Heat Shock Proteins;

TLS Online TPP Program

#Question id: 865

#Unit 1. Molecules and their Interaction Relevant to Biology

In autophagy, the endoplasmic reticulum (ER) first gives rise to a cup-shaped, membranous cisterna called the______

TLS Online TPP Program

#Question id: 866

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is known as Sanger’s reagent

TLS Online TPP Program

#Question id: 867

#Unit 1. Molecules and their Interaction Relevant to Biology

Match the correct diseases with their precursors

DiseaseProtein or precursor involved in disease
1. Cystic fibrosisa. Prion protein
2. Creutzfeldt–Jakob diseaseb. CFTR
3. Familial hypercholesterolaemiac. LDL receptor
4. fatal familial insomniad. β-amyloid protein
5. Alzheimer's diseasee. β-hexosaminidase

TLS Online TPP Program

#Question id: 868

#Unit 1. Molecules and their Interaction Relevant to Biology

Which statements is incorrect about ‘The chaperonin-assisted catalysis of protein folding’

A. The non-cooperative nature of ATP binding establishes GroEL as an allosteric enzyme.

B. In GroEL with a total of 14 subunits in two heptameric rings are observed.

C. In vivo GroES is composed of seven identical subunits whilst GroEL is composed of 14 larger subunits.

D. Gro-EL being called chaperonin60 (cpn60) and Gro-ES chaperonin10 (cpn10).

TLS Online TPP Program

#Question id: 869

#Unit 1. Molecules and their Interaction Relevant to Biology

Which statements are correct regarding protein folding

A. Many molecular chaperones were first described as heat shock proteins (Hsp) because Their rate of synthesis is increased at elevated temperatures

B. The renaturation of a denatured protein in vitro may not entirely mimic the folding of a protein in vivo.

C. Molecular chaperones are essential proteins that bind to only partially folded polypeptide chains.

D. Molecular chaperones function to lift folding polypeptides out of the false minima in their folding funnel.