There are few statements is given regarding the peptide bond are given

(a) For most peptide bonds the ratio of cis to trans configurations is approximately 1:1000

(b) Peptide bonds formed between Xaa and proline (Xaa is any amino acid) the cis to trans ratio is 1:4

(c) Co and N atoms of the peptide grouping are both in planar sp2 hybridization 

(d) All three kinds of bonds (N-Ca, Ca-Co, and the Co-N peptide bond) are single bonds

(e) The peptide bond is estimated to have 40% double bond character

Choose which of the following is correct 

#Question id: 2534

#Unit 2. Cellular Organization

How the matrix polysaccharides are differ from the cellulose?

#Question id: 2535

#Unit 2. Cellular Organization

Expansins belong to a large superfamily of proteins, divided into two major expansin families, α-expansins (EXPAs) and β-expansins (EXPBs), what is the function of these two?

a) EXPAs are more active on eudicot cell walls,whereas EXPBs are more active on grass cell walls

b) EXPAs are more active on grass cell walls, whereas EXPBs are more active on eudicot cell walls

c) EXPAs loosen cellulose–cellulose junctions containing xyloglucan, whereas EXPBs loosen wall complexes containing GAX

d) EXPAs loosen wall complexes containing GAX, whereas EXPBs loosen cellulose–cellulose junctions containing xyloglucan

Which combination is correct from some given above functions of expansins,?

#Question id: 2536

#Unit 2. Cellular Organization

If the cytoplasm of a cell is at pH 7, and the mitochondrial matrix is at pH 8, then the concentration of H+ ions ________.

#Question id: 2537

#Unit 2. Cellular Organization

Which of the following is the smallest structure that would most likely be visible with a standard (not super-resolution) research-grade light microscope?

#Question id: 2538

#Unit 2. Cellular Organization

Which of the following frequently imposes a limit on cell size?

#Question id: 2539

#Unit 2. Cellular Organization

Which structure is common to plant and animal cells?