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1.

For assimilation of one CO₂ molecule via photosynthesis, the energy required in form of ATP and NADPH₂ are:
(1) 2 ATP and 2 NADPH₂ 
(2) 5 ATP and 3 NADPH₂ 
(3) 3 ATP and 2 NADPH₂ 
(4) 18 ATP and 12 NADPH_2. 

2.

The primary role of oxygen in cellular respiration is to:

1.	yield energy in the form of ATP as it is passed down the respiratory chain.
2.	act as an acceptor for electrons and hydrogen, forming water
3.	combine with carbon, forming CO2.
4.	combine with lactate, forming pyruvate.

3.

Which of the following hormones does not have an intracellular receptor?
1. Estradiol
2. Thyroxin
3. Adrenocorticotrophic hormone
4. Cortisol

4.

Above the rows of hair cells of Organ of Corti, there is a thin elastic membrane called:
1. Reissner's membrane
2. Basilar membrane
3. Tectorial membrane
4. Tympanic membrane

5.

in the reaction,
$3{\mathrm{ClO}}^{-}\left(\mathrm{aq}\right)<mspace\; width="1em"></mspace>\to {{\mathrm{ClO}}_3}^{-}\left(\mathrm{aq}\right)<mspace\; width="1em"></mspace>+<mspace\; width="1em"></mspace>2{\mathrm{Cl}}^{-}\left(\mathrm{aq}\right)<mspace\; width="1em"></mspace>,<mspace\; width="1em"></mspace>\mathrm{is}<mspace\; width="1em"></mspace>\mathrm{an}<mspace\; width="1em"></mspace>\mathrm{example}<mspace\; width="1em"></mspace>\mathrm{of}$
1. oxidation reaction
2. reduction reaction
3. disproportionation reaction
4. decomposition reaction

6.

Reaction of $\mathrm{R}-\stackrel{\mathrm{O}}{\stackrel{\left|\right|}{\mathrm{C}}}-{\mathrm{NH}}_2$ with a mixture of Br₂ and KOH gives R-NH₂ as the main product. The intermediates involved in this reaction are: 
1. $\mathrm{R}-\stackrel{\mathrm{O}}{\stackrel{\left|\right|}{\mathrm{C}}}-\mathrm{NHBr}<mspace\; width="1em"></mspace>\mathrm{and}<mspace\; width="1em"></mspace>\mathrm{R}-\mathrm{N}=\mathrm{C}=\mathrm{O}$
2. RCN
3. $\mathrm{R}-\stackrel{\mathrm{O}}{\stackrel{\left|\right|}{\mathrm{C}}}-{\mathrm{NBr}}_2$
4. RNHBr

7. During an experiment and ideal gas is found to obey an additional law \(VP^2 = \text{constant}\). The gas is initially at a temperature \(T\) and volume \(V\). When it expand to a volume \(2V\), the temperature becomes:
1. \(T\)
2. \(2T\)
3. \(\sqrt{2}T\)
4. \(\frac{T}{2}\)

8.

A steel rod of length \(l,\) cross-sectional area \(A,\) Young’s modulus \(Y,\) and coefficient of linear expansion \(\alpha\) is rigidly fixed at both ends. It is heated through a temperature rise of \(t^{\circ}\text{C}\) so that expansion is fully prevented. If the rod is then allowed to perform work due to the stored elastic energy, the amount of work it can do is:
1. \((YA\alpha t)(l\alpha t)\)
2. \(\dfrac{1}{2}(YA\alpha t)(l\alpha t)\)
3. \(\dfrac{1}{2}(YA\alpha t) \times\dfrac{1}{2}(l\alpha t)\)
4. \(2(YA\alpha t)(l\alpha t)\)

9.

The moment of inertia of pulley is I and its radius is R. The string doesn't slips on the pulley, as system is released, the acceleration of the system is
 \(\)
1. $\frac{g}{\left(3+{\displaystyle \frac{I}{m{R}^2}}\right)}$
2. $\frac{g}{\left(1+{\displaystyle \frac{I}{m{R}^2}}\right)}$
3. $\frac{3g}{\left(1+{\displaystyle \frac{I}{m{R}^2}}\right)}$
4. $\frac{3g}{\left(2+{\displaystyle \frac{I}{m{R}^2}}\right)}$