List of practice Questions

The ratio of solubility of AgCl in 0.1 M KCl solution to the solubility of AgCl in water is:
(Given: Solubility product of AgCl = 10⁻¹⁰)

If the probability distribution of a random variable \( X \) is as follows, then the variance of \( X \) is: \[ X = x \quad 2 \quad 3 \quad 5 \quad 9 \] \[ P(X = x) = k \quad 2k \quad 3k^2 \quad k^2 \]

There are 6 cards numbered 1 to 6, one number on one card. Two cards are drawn at random without replacement. Let X denote the sum of the numbers on the two cards drawn. Then P(X > 3) is:

In a triangle \(ABC\), if

\[ (a - b)^2 \cos^2 \frac{C}{2} + (a + b)^2 \sin^2 \frac{C}{2} = a^2 + b^2, \]

then \( \cos A \) is:

Evaluate the expression: \[ \cos^{-1} \frac{3}{5} + \sin^{-1} \frac{5}{13} + \tan^{-1} \frac{16}{63} \]

If 4 letters are selected at random from the letters of the word PROBABILITY, compute the probability that at least one letter is repeated in the selection.

Formation of interfascicular cambium from fully developed parenchyma cells is an example for

Inhibition of Succinic dehydrogonase enzyme by malonate is a classical example of:

Which one of the following can be explained on the basis of Mendel’s Law of Dominance?
A. Out of one pair of factors one is dominant and the other is recessive.
B. Alleles do not show any expression and both the characters appear as such in F₂ generation.
C. Factors occur in pairs in normal diploid plants.
D. The discrete unit controlling a particular character is called factor.
E. The expression of only one of the parental characters is found in a monohybrid cross.
Choose the correct answer from the options given below:

List of endangered species was released by-

These are regarded as major causes of biodiversity loss:
A. Over exploitation
B. Co-extinction
C. Mutation
D. Habitat loss and fragmentation
E. Migration
Choose the correct opisdn:

Given below are two stateficents:
Statement I : Parenchyma is living but collenchyrna is dead tissue.
Statement II : Gymnosperis lack xylem vessels but presence of xylem vessels is the characteristic of angiosperms.
In the light of the above statements, choose the correct answer from the options given below:

The lactose present in the growth medium of bacteria is transported to the cell by the action of

Identify the set of correct statement:
A. The flowers of Vallisneria are colourful and produce nectar. 
B. The flowers of waterlily are not pollinated by water. 
C. In most of water-pollinated species, the pollen grains are protected from wetting. 
D. Pollen grains of some hydrophytes are long and ribbon like. 
E. In some hydrophytes, the pollen grains are carried passively inside water. 
Choose the correct answer from the options given below

Which of the following is an example of actinomorphic flower?

Given below are two statements:
Statement I : Bt toxins are insect group specific and coded by a gene cry IAc. 
Statement II : Bt toxin exists as inactive protoxin in B. thuringiensis. However, after ingestion by the insect the inactive protoxin gets converted into active form due to acidic pH of the insect gut. 
In the light of the above statements, choose the correct answer from the options given below:

The capacity to generate a whole plant from any cell of the plant is called:

The cofactor of the enzyme carboxypeptidase is :

Hind II always cuts DNA molecules at a particular point called recognition sequence and it consists of:

How many molecules of ATP and NADPH are required for every molecule of CO₂ fixed in the Calvin cycle?