CSIR-UGC NET/JRF LIFE SCIENCE EXAM.DECEMBER 2014 SOLVED PAPER WITH DESCRIPTION Q.NO. 61 to 70

CSIR UGC NET LIFE SCIENCE EXAM. DEC.  QUESTION NO.51 TO 60 WITH SOLUTION

Q61. The degree of genetic relatedness between the offspring and their parents-
(a) higher than that between sister and brother
(b) lower than that between sister and brother
(c) the same as that between sister and brother
(d) dependent on the number of siblings
Answer-C

Q62. You want to purify a recombinant protein of your interest. You can use affinity chormatograpty of purity as you have nickel columns available in the laboratory. With what molecule will you tag the protein to purity using those columns?
(a) GST
(b) Histidine
(c) Histamine
(d) proline
Answer-B

Q63. During which geological period was there an explosive increase in the number of many marine invertebrate phyla?
(a) Ordovician
(b) Devonian
(c) Permian
(d) Cambrian
Answer-D
Q64. An example of the species interaction called commensalism is-
(a) nitrogen- fixing bacteria in association with legume plants roots
(b) microbes in living human gut
(c) female mosquito deriving nourishment from human blood
(d) orchid plant growing on the trunk of a mango tree
Answer-D

Q65. In which ecosystem is the detrital pathway of energy flow most important?
(a) Lakes
(b) Grasslands
(c) Tropical rain forests
(d) Oceans
Answer-C

Q66. What parameter, plotted on Y- axis against generation time, would yield the curve slown in the figure?
(a) Survivorship
(b) Body size
(c) Lifespan
(d) Intrinsic rate of increase
Answer-D

Q67. In an experiment of detect a new protein in fixed cells, no secondary antibody tagged with fluorescence dye is available. what should be the best choice out of the following to detect the proteins?
(a) Protein A-FITC
(b) Protien A- Sepharose
(c) Biotin FITC
(d) Avidin-FITC
Answer-A

Q68. Lower limits of detection by sensord is important. Which method of detection is more sensitive than glass electrode used for pH measurement?
(a) Absorption spectroscopy
(b) Refractive index
(c) Circular dichroism
(d)Fluorescence spectroscopy
Answer-D

Q69. If  a researcher intends to identify a specific brain area activity linked to a cognitive function in human subjects, which one of the following techniques should be used?
 (a) CAT
(b) MRI
(c) fMRI
(d) Patch clamp
Answer-C

Q70. Which of the following statement is incorrect for fluorescence in situ hybridization (FISH) technique?
(a) A fluorescence or confocal microscope is used for detection of signal
(b) A labelled sequence of nucleotides are used
(c) Specific fluorescence tagged antibodies are used
(d) A stringent washing step is essenyial to remove appearance of non specific signal
Answer-C