How many complete turns are there in an ideal α-helix that contains 15 amino acids and has a pitch of 0.54 nm and a rise of 0.15 nm?

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#Question id: 15658

#SCPH01 Biochemistry

You are studying a new strain of E. coli that can utilize the disaccharide melibiose very efficiently. You find that utilization depends on the enzyme melibiase, which is encoded by the gene Mel1. Mel1 is not expressed unless melibiose is present in the growth medium.

Next, you isolate a third mutant, MelC–, which gives constitutive melibiase expression. The MelC– mutation is closely linked to Mel1 and MelB–. Genetic tests of the MelC– mutation yield the following:

 

As above, classify the MelC– mutation in terms of its basic genetic properties and explain how you arrived at your conclusions.

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#Question id: 3014

#SCPH05 I Biotechnology

Regarding prokaryotic reproduction, which statement is correct?

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#Question id: 1427

#SCPH06 I Botany

 In females, all the cells in a tumor have the same inactive X chromosome. The reason for this is that:

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#Question id: 10138

#I Life Science/ Life Sciences Group – I-V

The Calvin–Benson cycle proceeds in three phases that are highly coordinated in the chloroplast these three phases namely--Carboxylation, Reduction and Regeneration. The following statements are not related to the three phases of Calvin–Benson cycle:

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#Question id: 17666

#SCPH28 | Zoology

 In the Mesozoic era, periods included;

A. Cretaceous

B. Jurassic

C. Triassic

i) Increase of dicotyledons

ii) Seeds ferns disappear

iii) Rapid development of angiosperms

iv) Spread of cycads and conifers

v) Gymnosperms declined

Find out the correct match of given period with their plants diversification events;