Multiple Choice QuestionsDesulphovibrio desulfuricans (A) and Pseudomonas species (B) are involved in mercury bioremediation. Which of the statements below is correct?
A converts mercury to mercuric ion, B converts mercury to methyl mercury.
A converts mercury to methyl mercury, B converts to mercuric ion.
A converts mercury to methyl mercury, B converts methyl mercury to mercuric ion.
A converts methyl mercury to mercuric ion, B converts mercury to mercuric ion.
During transgenesis, the location of the genes and their number integrated into the genome of he transgenic animal are random. It is often necessary to determine the copy number of genes and their tissue-specific transcription. The following are the possible methods used for the determination.
A. Polymerase Chain Reaction (PCR)
B. Southern blot hybridization
C. Reverse Transcriptase PCR
D. Western blot
Choose the correct set of combinations:
A and B
B and C
B and D
A and D
Agrobacterium tumefaciens, also known as natural genetic engineers, causes crown-gall disease in plants. However, when the same bacteria are used to raise transgenic plants with improved agronomic traits, no such tumor (disease) is observed. This is due t:
A.Vir D2 gene is mutated in Ti plasmid
B. Disarmed Ti plasmid is generally used.
C. Heat-shock during transformation destroys virulence.
D. Oncogenes have been emoved.
Which one of the following combination of above statements is correct?
A and C
A and D
B and C
B and D
A person takes 1.0 mL of insulin injection daily at 8:00 A.M. His son gave him 1.5 mL insulin at 8:00 A.M. considering the father will go to party and eat more during lunch. The father also avoided breakfast, as he planned to eat more during lunch. Which one of the following events will occur?
Father will be normoglycemic.
Father will be in hypoglycemic condition before lunch
Father will be in hyperglycemic condition before lunch.
Blood glucose of father will be low after taking lunch.
Which of the following organism is widely used as a biocontrol agent in organic farming?
Rhizobium tropicii
Trichoderma viridis
Fusarium oxysporum
Nostoc muscorum
Sexual selection results in variation in the reproductive success of males, often due to female choice with particular phenotypes. The type of sexual selection occurs because
Males cannot compete with other males
The cost of breeding is higher for females as compared to males.
Inappropriate mating results in a similar reduction in the fitness of females and males.
Males are a limiting resource for females.
To replace animal use in testing hepatic toxicity of a drug on trial, which one of the following would be in vitro to be closest to the in vivo scenario?
Liver cells.
Hepatic cell lines
liver slices
Co-culture of liver parenchymal cells and Kupfer cells
Which of the following does not represent a strategy for phytoremediation?
Phytodegradation.
Phytomining
Continuous removal through hyperaccumulators.
Chelate-mediated extraction of pollutants.
The word 'fermentation' is used in biochemistry and microbial technology to denote different phenomena. If the former is called C and the latter is called T, which of the following statements is true?
All C is T but all T is not C.
All T is C but all C is not T.
T is always a product of genetic engineering while C is not.
C is always an aerobic process, while T can be aerobic or anaerobic.
The functionality of the pax6 gene in the formation of optic and nasal structures may be attributed to the following:
(A) Pax6 makes the optic vesicle competent and allows lens formation.
(B) The optic vesicle can induce any part of the head electron to form the nasal and optic structures, due to the presence of pax6.
(C) Pax6 renders the head ectoderm competent to receive signals from the optic vesicle.
(D) Apart from the optic vesicle, the head ectoderm may also be induced by BMP4 and FGF8, so pax6 is not exclusive for lens formation.
Which of the above attributions are true?
(A) and (D)
(C) and (D)
(B) and (C)
(C) only
