Questions 511–520 of 1235. Imported answers require independent review unless marked reviewed.

Topic practice 1235 questionsPage 52 of 124

Question 23

Open question
XL-PMSQ2 marksNeeds review
Consider the following reaction:
Diagram for Life Sciences question 23

The CORRECT pathway(s) involved in the reaction is/are
Your answerSelect all correct options. You can choose more than one.

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Question 24

Open question
XL-PNAT2 marksNeeds review
An aqueous solution of aspirin (HA) is prepared at pH 7.4. The ratio of concentration of A

and HA at equilibrium is ______ (round off to the nearest integer).
Given:

of aspirin is


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Question 25

Open question
XL-PNAT2 marksNeeds review
The total number of 3-centre-2-electron bonds in B

H

is ______ (in integer).

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Question 26

Open question
XL-PNAT2 marksNeeds review
The equilibrium constant for isomerization of 1-butene to trans-2-butene at 27 °C is ______ (round off to one decimal place).
Given: Gas constant = 8.314 J K

mol


of 1-butene = +71.39 kJ mol


of trans-2-butene = +63.06 kJ mol


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Question 27

Open question
XL-PNAT2 marksNeeds review
A 16 mW monochromatic light emits

photons in 1 second. When this light incidents on a metal strip, photoelectrons are emitted. The wavelength of the emitted photoelectrons (in Å) is ______ (round off to one decimal place).
Given: Work function of the metal = 2.0 eV
Charge of an electron =

C
Mass of an electron =

kg
Planck’s constant =

J s

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Question 28

Open question
XL-QMCQ1 markNeeds review
Which of the immune cells listed below are agranular?
P. Eosinophils Q. Mast cells R. Monocytes S. T-cells
Your answerChoose one option.

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Question 29

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Which one of the following enzymes is located in the outer mitochondrial membrane?
Your answerChoose one option.

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Question 30

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Which one of the following statements about the DNA polymerase II of E. coli is NOT correct?
Your answerChoose one option.

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Question 31

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Which one of the following compounds is NOT a translation inhibitor?
Your answerChoose one option.

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Question 32

Open question
XL-QNAT1 markNeeds review
A dye was allowed to undergo migration on a chromatographic paper using a solvent. The dye, and the solvent-front migrated 5 and 20 cm, respectively, from the point of origin. The retention factor (rounded off to two places of decimals) for the dye is _____.

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