Which of the following is a prime example of a ribonucleoprotein enzyme, the catalytic activity of which (under non-physiological conditions), resides solely in its RNA component
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Biotechnology Engineering · all questionsBasic Principles of Biotechnology
Basic Principles of Biotechnology
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Main functions of baffles in a bioreactor are
P. To prevent a vortex.
Q. To increase aeration.
R. To reduce interfacial area of oxygen transfer.
S. To reduce aeration rate.
P. To prevent a vortex.
Q. To increase aeration.
R. To reduce interfacial area of oxygen transfer.
S. To reduce aeration rate.
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All the following may be methods for the inhibition of microbial growth by antibiotics except
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A feature common to almost all transmembrane proteins is
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The distribution of transmembrane protein in the palne of a cell membrane can best be visualized by which of the following:
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Broker, Chow, Roberts and P. Sharp hybridized mRNA from adenovirus to denatured adenovirus DNA and examined the resultant duplex molecules by electron microscopy. Which of the following did they observe?
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If a mutation occurred in the phosphorylation site in the CTD domain of RNA polymerase II, which of the following outcomes would be observed?
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A microorganism when viewed under a compound microscope with objective of 40X and eye piece of 10X magnification measured 400μ in length. The same microorganism when viewed under a dissecting microscope with 10X lens, would measure
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Which of the following technique is used to inactivate a gene by altering the DNA encoding it?
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Gene conversion is observed
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The physiological mechanism responsible for flowering in response to temperature
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Which of the following amino acids have side chains that are negatively charged under physiological conditions (i.e., near pH 7)?
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Histones have very high percentage of basic amino acids (15 - 30%). For this class of proteins which of the following reagents would be a suitable choice for generating peptides in determination of amino acid sequence of the protein
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Number of nucleotide present in FMN is
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If a reaction is at equilibrium, the free energy, ΔG change is
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Order the following events observed during muscle contraction in the correct sequence
1. The sarcomere shortens
2. ATP is hydrolyzed
3. Ca2+ binds to troponin
4. ATP binds to myosin
5. Mosin contracts F-actin
6. F-actin moves
7. Tropomyosin moves
8. Ca2+ is released from the sarcoplasmic reticulum
1. The sarcomere shortens
2. ATP is hydrolyzed
3. Ca2+ binds to troponin
4. ATP binds to myosin
5. Mosin contracts F-actin
6. F-actin moves
7. Tropomyosin moves
8. Ca2+ is released from the sarcoplasmic reticulum
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Under standard temperature (T) and pressure (P) conditions, 128 g of an ideal gas molecule A occupies a volume of 1 L. The gas molecule A obeys the relationship RT = 0.25 PV. R and V are universal gas constant and ideal gas volume, respectively. The molecule A is
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A peptide has the sequence Glu-His-Trp-Ser- Gly-Leu-Arg-pro-Gly. What is the net charge of the molecule at PH 11.
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Which of the following statements are correct? Very long DNA fragments (> 100 kb) from eukaryotic genomes
P. Can be efficiency packaged in a λ phage vector
Q. Can be propagated in yeast artificial chromosomes
R. Must have cohesive ends for cloning
S. Can be separated by pulsed field gel electrophoresis techniques
P. Can be efficiency packaged in a λ phage vector
Q. Can be propagated in yeast artificial chromosomes
R. Must have cohesive ends for cloning
S. Can be separated by pulsed field gel electrophoresis techniques
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Which one of the following statements about eukaryotic RNA polymerases I, II and III is false?
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