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1. If 40% of a number is 84, what is 25% of that number?

Aptitude (Part A)

42

52.5

60

75

2. A train covers 180 km in 2 hours 15 minutes. What is its average speed?

Aptitude (Part A)

72

80

90

96

3. In a group of 60 students, 35 like Biology, 30 Chemistry, 15 both. How many like neither?

Aptitude (Part A)

5

10

15

20

4. All enzymes are proteins. Best logical conclusion?

Aptitude (Part A)

All proteins are enzymes

Some proteins are enzymes

No protein is an enzyme

Enzymes cannot be proteins

5. Why does DNA migrate toward the anode?

CSIR Life Sciences (Part B)

DNA is positively charged

DNA is negatively charged

DNA is neutral

DNA binds SDS

6. Lac operon when glucose low & lactose present?

CSIR Life Sciences (Part B)

cAMP high; CAP binds; transcription high

cAMP low; CAP binds

CAP cannot bind

Repressor binds

7. Histone modification linked to activation?

CSIR Life Sciences (Part B)

Deacetylation

Acetylation

DNA methylation

H3K9 trimethylation

8. 2n=16. Chromatids at metaphase I?

CSIR Life Sciences (Part C)

16

32

64

128

9. Gs protein activation leads to?

CSIR Life Sciences (Part C)

Decrease cAMP

Increase cAMP

Increase IP3

Increase cGMP

10. χ²=3.2, df=1, α=0.05. Conclusion?

CSIR Life Sciences (Part C)

Reject null

Fail to reject null

p < 0.01

Invalid test

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