Questions and Answers

24. The polymorphic domains for Class II MHC proteins are:
(A) α and β2 domains only
(B) β and α2 domains only
(C) α1 and β1 domains only
(D) α2 and β2 domains only

23. Diphtheria toxin, tetracycline and streptomycin inhibit:
(A) DNA repair
(B) DNA replication
(C) transcription
(D) translation

22. The most widely used program for multiple sequence alignment is:
(A) BLAST
(B) FASTA
(C) CLUSTAL
(D) Chime

21. In the ABO blood group system, antigenic determinants are:
(A) nucleic acid
(B) carbohydrate
(C) lipid
(D) protein

20. Gas vacuoles are present in:
(A) Anabaena flos-aquae
(B) Bacillus subtilis
(C) Acanthurus nigrofuscus
(D) Mycobacterium tuberculosis

19. Molecular chaperones are a class of proteins that facilitate:
(A) the proper folding of newly synthesized proteins
(B) unfolding of newly synthesized proteins
(C) degradation of newly synthesized proteins
(D) targeting of newly synthesized proteins

18. The lipopolysaccharides present in bacterial cell wall has lipid A which is connected to:
(A) O-polysaccharide
(B) core polysaccharide
(C) both with O-polysaccharide and core polysaccharide
(D) rhamnose-mannose disaccharide

17. The study of evolutionary relationships is known as:
(A) genomics
(B) proteomics
(C) phylogenetics
(D) genetics

16. Wash out (as defined by D=max) of a continuous stirred tank fermenter is characterized by (X=biomass, S=substrate concentration in bioreactor, So=substrate concentration in feed, P=product concentration in bioreactor):
(A) X = 0, S = 0, P = 0
(B) X = 0, S = So, P = 0
(C) X =0, S < 0, P = 0
(D) X <0, S <0, P <0