Practice Questions

TLS Online TPP Program

#Question id: 2632

How would transcription of the E. coli trp operon be affected,

I. If Removing sequence 4;

II. Changing several nucleotides in sequence 3 so that it can base-pair with sequence 4 but not with sequence 2;

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

I-No attenuation of transcription.
I & II- The only regulation would be that afforded by the Trp repressor.
II-Constant attenuation of transcription. Attenuator always forms, regardless of the availability of tryptophan.
Only A & C

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#Question id: 10253

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

Two pathways for the splitting of sucrose are known in plants, both of which take part in the use of sucrose from phloem unloading;

#Question id: 2749

#SCPH05 I Biotechnology

Approximately what proportion of the human genome is made up of repetitive DNA sequences?

#Question id: 693

#SCPH05 I Biotechnology

In an alpha helix, the R groups on the amino acid residues:

#Question id: 87

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

The compounds α-D-fructofuranose and β-D-fructofuranose are ________.

#Question id: 1565

#SCPH01 Biochemistry

Which of the following are symptoms of inflammation that might appear in such art?