Which of the following is correct about RNA ?
(A) Unstable and mutates slower
(B) Unstable and mutates faster
(C) Stable and mutates faster
(D) Stable and mutates slower
Choose the correct answer from the options given below :

Observe the given figure and answer the following questions:

Which of the following are not part of Innate immunity?
(A) Skin and acid in stomach
(B) B-Lymphocytes
(C) IgE and IgG
(D) Tears from eyes

Match List - I with List - II.

List - I	List - II
(A) Down’s syndrome	(I) Inborn error of metabolism
(B) Klinefelter’s syndrome	(II) Absence of one of the X-chromosome
(C) Turner’s syndrome	(III) Presence of an additional copy of X-chromosome
(D) Phenylketonuria	(IV) Presence of an additional copy of chromosome number-21

Choose the correct answer from the options given below :

Which among the following is not a primary consumer?

The puffed-up appearance of dough is due to the production of :

Identify the statements true for RNA.
(A) RNA acts as a genetic material for some viruses.
(B) RNA also functions as an adapter molecule.
(C) RNA has hexose sugar as its backbone.
(D) RNA also acts as catalyst in some cases.
Choose the correct answer from the options given below :

Read the passage carefully. Attempt the questions.
An overwhelming majority (99 per cent) of animals and nearly all plants cannot maintain a constant internal environment. Their body temperature changes with the ambient temperature. In aquatic animals, the osmotic concentration of the body fluids change with that of the ambient air and water osmotic concentration. These animals and plants are simply conformers. Considering the benefits of a constant internal environment to the organism, we must ask why these conformers had not evolved to become regulators. Recall the human analogy we used above; much as they like, how many people can really afford an air conditioner? Many simply 'sweat it out' and resign themselves to suboptimal performance in hot summer months. Very small animals are rarely found in polar regions. During the course of evolution, the costs and benefits of maintainin a constant internal environment are taken into consideration. Some species have evolved the ability to regulate, but only over a limited range of environmental conditions, beyond which they simply conform.
If the stressful external conditions are localised or remain only for a short duration, the organism has five other alternatives for survival.
Identify the set of aquatic animals whose osmotic concentration is not constant.

If \(X\) is a random variable and \(a, b\) are real numbers, then which of the following statements are correct?
(A) \(E[a X+b]=a E(X)+b\)
(B) \(\operatorname{Var}(a X+b)=a^2 \operatorname{Var}(X)+b\)
(C) \(\operatorname{Var}(a X+b)=a \operatorname{Var}(X)\)
(D) \(\operatorname{Var}(X)=E\left(X^2\right)-[E(X)]^2\)
Choose the correct answer from the options given below:

The function \(f(x)=x+\frac{1}{x}\) has

Which of the following is not the characteristics of enzymes ?

An electron is projected into a magnetic field of flux density \( 10 \text{ Wb/m}^2 \) with a velocity of \( 3 \times 10^7 \text{ m/s} \) at an angle of \( 30^{\circ} \) to the field. The magnetic force on the electron is:

World Summit on 'Sustainable Development' in 2002 was held in :

Which of the following is not categorized under narrowly utilitarian benefit for conserving biodiversity?