List of practice Questions

Which statement is wrong for Krebs' cycle?

The DNA fragments separated on an agarose gel can be visualised after staining with

Lungs are made up of air-filled sacs the alveoli. They do not collapse even after forceful expiration, because of:

Identify the wrong statement in context of heartwood.

A dioecious flowering plant prevents both:

The DNA double helix is exposed

A gene whose expression helps to identify transformed cell is known as

Asymptote in a logistic growth curve is obtained when

In Bougainvillea thorns are the modifications of

Which one from those given below is the period for Mendel's hybridization experiments?

Artificial selection to obtain cows yielding higher milk output represents

Select the correct route for the passage of sperms in male frogs :

The function of copper ions in copper releasing IUD's is :

Thalassemia and sickle cell anemia are caused due to a problem in globin molecule synthesis. Select the correct statement.

David invested in three schemes A, B, C at $10\%$, $12\%$, $15\%$ p.a. respectively. The total interest in one year was ₹3200. Also, $C$ was $150\%$ of $A$ and $240\%$ of $B$. What was the amount invested in $B$?

Let A, B, C be finite sets. Suppose that $n(A)=10, n(B)=15, n$ $(C)=20, n(A \cap B)=8$ and $n(B \cap C)=9$. Then the possible value of $n ( A \cup B \cup C )$ is

The equation of one of the common tangents to the parabola $y^{2}=8 x$ and $x^{2}+y^{2}-$

If $f\left(x\right) = \cos^{-1} \left[\frac{1-\left(\log x\right)^{2}}{1+\left(\log x\right)^{2}}\right] $ then the value of $f'(e)$ is equal to

If $\displaystyle\sum^n_{R = 0} (-1)^r \; \frac{^{n}C_{r}}{^{r+3}C_{r}} = \frac{3}{a+3} $ , then a - n is equal to

For the reaction $CO ( g )+\frac{1}{2} O _{2}( g ) \rightarrow CO _{2}( g )$ Which one of the statement is correct at constant $T$ and $P$ ?

A jar full of whisky contains 40% alcohol. A part of this whisky is replaced by another containing 19% alcohol and now the percentage of alcohol becomes 26%. The quantity of whisky replaced is:

After two hours, one-sixteenth of the starting amount of a certain radioactive isotope remained undecayed. The half life of the isotope is

A capillary tube of radius $R$ is immersed in water and water rises in it to a height $H$. Mass of water in the capillary tube is $M$. If the radius of the tube is doubled, mass of water that will rise in the capillary tube will now be :

A charged particle moves through a magnetic field perpendicular to its direction, then