List of practice Questions

Following are different stages in blood clotting. Arrange them in correct sequence:
[I)] Activation of prothrombin
[II)] Formation of prothrombin activator
[III)] Conversion of fibrinogen into soluble fibrin
[IV)] Clot retraction
[V)] Conversion of soluble fibrin into insoluble fibrin threads

Study the following and pick up the correct statements:
In DNA fingerprinting, DNA is cut into small pieces at specific sites by restriction endonucleases.
Transfer of DNA strands on to the nylon membrane is called southern blotting.
The largest known human gene codes for the protein dystrophin.
Least number of genes are located in Y-chromosome.

Match the following:

Method of sex determination

• A) XX – XY
• B) XX – XO
• C) ZW – ZZ
• D) ZZ – ZO

Example

• I) Grasshoppers
• II) Birds
• III) Human beings
• IV) Moths
• V) Honey bees

Identify the correct match:

If two diodes \( D_1 \) and \( D_2 \) are connected as shown in the figure, then

Consider the following: Statement I: CCl₄ does not undergo hydrolysis. But SiCl₄ undergoes hydrolysis.
Statement II: Thermal and chemical stability of GeX₄ is more than GeX₂.

A body of mass $5~\text{kg}$ starts from the origin with an initial velocity $\vec{v}_0 = (30\hat{i} + 40\hat{j})~\text{m/s}$.
If a constant force $\vec{F} = -(i + 5j)~\text{N}$ acts on the body, then the time in which the y-component of its velocity becomes zero is

If a gas of volume $400~\text{cc$ at an initial pressure $P$ is suddenly compressed to $100~\text{cc}$, then its final pressure is (The ratio of specific heats $\gamma = 1.5$)}

If the distance travelled by a freely falling body in the last but one second of its motion is 5 m, then the last second is:

Three plants, Mustard, Calotropis, and Guava, are collected. There are 30 nodes in Mustard, 30 nodes in Calotropis, 25 nodes in Guava are present. Find the number of leaves put together in all three plants?

Loss of chlorophyll leading to yellowing in leaves is called: