MCQ
A biological catalyst is essentially
  • An enzyme
  • B
    A carbohydrate
  • C
    An amino acid
  • D
    A nitrogen compound

Answer

Correct option: A.
An enzyme
a
(a) An enzyme (protein) is a biological catalyst.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

Which of the following contains three pairs of electrons
A compound of carbon hydrogen and nitrogen contains three elements in the respective ratio of $9 : 1 : 35$ grams. The Empirical formula for the compound is
Dissolving $1.24 g$ of white phosphorous in boiling $NaOH$ solution in an inert atmosphere gives a gas $Q$. The amount of $CuSO _4$ (in g) required to completely consume the gas $Q$ is. . . .  [Given : Atomic mass of $H =1, O =16, Na =23, P =31, S =32, Cu =63$ ]
Which of the following expression is correct
Which of the following reaction does not form $PCl_3$ as one of the product
Among the following, the intensive property is (properties are)

$(A)$ molar conductivity $(B)$ electromotive force

$(C)$ resistance $(D)$ heat capacity

Assign $A, B, C, D$ from given type of reaction. $Mn{O_2} + 2KOH + \frac{1}{2}{O_2} \longrightarrow {K_2}Mn{O_4} + {H_2}O$
Given below are two statements :

Statement $I$: In group $13$, the stability of $+1$ oxidation state increases down the group.

Statement $II$: The atomic size of gallium is greater than that of aluminium.

In the light of the above statements, choose the most appropriate answer from the options given below:

The test to distinguish primary, secondary and tertiary amines is
Consider th following four reactions:

$(I)$ $\begin{array}{*{20}{c}}
  {{C_6}{H_5} - CH - Cl} \\ 
  {\,\,|} \\ 
  {\,\,\,\,\,\,\,\,\,C{H_3}} 
\end{array}\xrightarrow[{5\% \,\,water}]{{95\% \,\,\,acetone}}\begin{array}{*{20}{c}}
  {{C_6}{H_5} - CH - OH} \\ 
  | \\ 
  {\,\,\,\,\,\,C{H_3}} 
\end{array}$

$(II)$ $\begin{array}{*{20}{c}}
  {{C_6}{H_5} - CH - Cl} \\ 
  {\,\,|} \\ 
  {\,\,\,\,\,\,C{H_3}} 
\end{array}\xrightarrow[{10\% \,\,water}]{{90\% \,\,\,acetone}}\begin{array}{*{20}{c}}
  {{C_6}{H_5} - CH - OH} \\ 
  | \\ 
  {\,\,\,\,\,\,C{H_3}} 
\end{array}$

$(III)$ $\begin{array}{*{20}{c}}
  {{C_6}{H_5} - CH - Cl} \\ 
  {\,\,|} \\ 
  {\,\,\,\,\,\,C{H_3}} 
\end{array}\xrightarrow[{20\% \,\,water}]{{80\% \,\,\,acetone}}\begin{array}{*{20}{c}}
  {{C_6}{H_5} - CH - OH} \\ 
  | \\ 
  {\,\,\,\,\,\,C{H_3}} 
\end{array}$

$(IV)$ $\begin{array}{*{20}{c}}
  {{C_6}{H_5} - CH - Cl} \\ 
  {\,\,|} \\ 
  {\,\,\,\,\,\,C{H_3}} 
\end{array}\xrightarrow{{100\% \,water}}\begin{array}{*{20}{c}}
  {{C_6}{H_5} - CH - OH} \\ 
  | \\ 
  {\,\,\,\,\,\,C{H_3}} 
\end{array}$

Arrange these reactions in decreasing order of greater proportion of inverted product and select correct answer from the codes given below :