Questions
Which of the following enzymes helps in the digestion of fats?
- Lipase
- Amylase
- Nuclease
- Polymerase
- Endonuclease
Which of the following nucleotides serves as allosteric regulator and an energy source for protein synthesis?
- ATP
- GTP
- CTP
- UDP
- cGMP
At physiological pH nucleotides are ___________.
- positively charged
- negatively charged
- amphoteric
- neutral
- Zwitterions
Which of the following analogues is used in the treatment of gout?
- Allopurinol
- Cytarabine
- Azathioprine
- 5-iodouracil
- 5-methylcytosine
The oxo and amino groups of purines and pyrimidines exhibit which of the following type of tautomerism?
- Keto-enol and amine-imine
- Methyl-methenyl
- Amide-imidic
- Ketene-yenol
- Enamine-enamine
Which of the following enzymes relax or insert supercoils in DNA?
- Endonucleases
- Exonucleases
- Helicases
- Topoisomerases
- DNA ligases
End product of purine metabolism in mammals other than higher primates is _________.
- allantoin
- uric acid
- ionosine
- beta-alanine
- ammonia
The concentration of nucleotides and nucleic acids are often expressed in terms of ________.
- absorbance at 260 nm
- absorbance at 360 nm
- absorbance at 450 nm
- absorbance at 110 nm
- absorbance at 540 nm
Small DNA elements capable of transposing themselves in and out of the host genome in ways that affect the function of neighbouring DNA sequences are known as ________.
- jumping genes
- processed genes
- pseudogenes
- microsatellite sequences
- lines
Which of the following is used in recombinant DNA experiments to lower the melting temperature?
- Formamide
- betaine
- magnesium ions
- dimethyl sulfoxide (DMSO)
- Taq pol