Bacteriophage λ, has two mode of life cycle;  lytic and lysogenic.  In the lytic growth

a) a single Cro dimer is bound to OR3; this site overlaps PRM and so Cro represses that promoter

b) Repressor bound at OR1 and OR2 blocks RNA polymerase binding at PR, repressing transcription from that promoter

c) PR and PL binds RNA polymerase and directs transcription of lytic genes

d) During lytic, PRM is on while PR (and PL) are off

Find the correct combinations of lytic growth.

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#Question id: 27414

#Unit 1. Molecules and their Interaction Relevant to Biology

Which of the following is correctly describing the common structure of any sterol

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#Question id: 8718

#Unit 9. Diversity of Life Forms

Which of the following would, if it had acted upon a gene, prevent this gene from acting as a reliable molecular clock?

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#Question id: 16124

#Unit 7. System Physiology – Animal

Thermoreceptors are:

a) activated only by severe cold or severe hot

b) located on the superficial layers of the skin

c) a subtype of nociceptors

d) on dendritic endings of A delta fibres and C fibres

which of following combination is correct?

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#Question id: 213

#Unit 1. Molecules and their Interaction Relevant to Biology

Which amino acid can form a covalent bond to the coenzyme pyridoxal phosphate?

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#Question id: 10531

#Unit 2. Cellular Organization

Flippases catalyze translocation of the aminophospholipids: