List of practice Questions

A nucleic acid chain comprises of
A. Phosphate group
B. Nitrogen base
C. Pentose sugar
D. Thiol group
E. $\beta$(1$\rightarrow$4) linkage
Choose the correct answer from the options given below:

Which one of the following transition metals is present in Vitamin B₁₂?

Which statement is true with respect to colostrum?

Natural rubber is a polymer of ________ while synthetic rubber neoprene is formed by polymerization of ________.

Aldosterone regulates the water and electrolyte balance in the human body by

Which statement is true with respect to meiosis?

Given below are two statements:
Statement I: Precision refers to the closeness of various measurements for the same quantity.
Statement II: Accuracy is the agreement of the obtained value with the known or true value of the quantity.
In light of the above statements, choose the correct answer from the options given below:

Which one of the following is caused by point mutation?

In the redox reaction between $ \text{Cr}_2\text{O}_7^{2-} $ / $ \text{H}^+ $ and sulphite ion, what is the number of moles of electrons involved in producing 3.0 moles of the oxidised product?

Which one of the following statements about AIDS caused by HIV is correct?

Which one of the following drugs contains a $ \beta $-lactam structure?

Arrange the compounds A, B, C, and D in the increasing order of their reactivity towards SN$_1$ reaction.
A = C$_6$H$_5$CH$_2$Cl
B = C$_6$H$_5$Cl
C = CH$_2$=CH–Cl
D = CH$_3$–CH$_2$–Cl

Match the items of List I with the items in List II.

Choose the correct answer from the options given below:

What volume of 0.2 M Acetic acid is to be added to 100ml of 0.4M Sodium acetate so that a Buffer solution of pH equal to 4.94 is obtained? (pK$_a$ of CH$_3$COOH = 4.76)

A fair coin is tossed a fixed number of times. If the probability of getting 5 heads is equal to the probability of getting 4 heads, then the probability of getting 6 heads is:

Compounds A and B, having the same molecular formula $ C_4H_8O $, react separately with $ CH_3MgBr $, followed by reaction with dil. HCl to form compounds X and Y respectively. Compound Y undergoes acidic dehydration in the presence of Conc. $ H_2SO_4 $ much more readily than X. Compound Y also reacts with Lucas reagent, much more readily than X, with the appearance of turbidity. Identify X and Y.

The two heavy chains of a human antibody are linked to each other by:

A dry cell consists of a moist paste of $ \text{NH}_4\text{Cl} $ and $ \text{ZnCl}_2 $ contained in a Zn casing which encloses a carbon rod surrounded by black $ \text{MnO}_2 $ paste. What is the role of $ \text{ZnCl}_2 $ in it?

Telomerase, an RNA-protein complex, adds telomeres at the end of chromosomes. What kind of enzymatic activity does it possess?

Which one of the following is commonly used for converting cellulose raw materials into glucose?