Practice Questions

TLS Online TPP Program

#Question id: 3869

Which one of the following statements about E. coli RNA polymerase (core enzyme) is false?

#SCPH05 I Biotechnology

It can start new chains de novo or elongate old ones.
It has no catalytic activity unless the sigma factor is bound.
It uses nucleoside 5'-triphosphates as substrates.
Its activity is blocked by rifampicin.

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TLS Online TPP Program

#Question id: 2927

#SCPH05 I Biotechnology

Site-directed mutagenesis of Tyr-15 to Phe in cdc2:

TLS Online TPP Program

#Question id: 14157

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

A ktup is composed of ___residues for protein sequences and _____ residues for DNA sequences.

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#Question id: 19692

#SCPH01 Biochemistry

What does ST interval show on ECG?

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#Question id: 795

#SCPH05 I Biotechnology

A single-stranded DNA molecule contains 40 nucleotides and has the sequence 5’-(GA)20-3’. When this single strand binds to a complementary DNA strand,

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#Question id: 3643

#SCPH01 Biochemistry

One DNA strand, the______________, is made continuously in a 5→3 direction from the origin.