Download App

Biomolecules — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistryBiomolecules1 Mark
MCQ
Enzymes are absent in:
  • A
    Algae
  • B
    Fungi
  • C
    Bacteria
  • ✓
    Virus
✓

Answer

Correct option: D.
Virus
Enzymes are biological catalysts. Without enzymes no biochemical reaction can take place in any living cell at biologically significant rate. Virus are non living, crystallizable entities.
Hence, virus do not have any enzymes of their own but make use of enzyme machinery of the host for their replication.

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

Explore more

More "M.C.Q (1 Marks)" from Biomolecules→Biomolecules — all question types→Chemistry STD 12 Science question papers→Gujarat Board STD 12 Science question papers→Gujarat Board question paper generator→

Similar questions

In the Liebermann's nitroso reaction, sequential changes in the colour of phenol occurs as
→
For an exothermic reaction $A \to B$ , the activation energy is $65\ kJ mol^{-1}$ and heat of reaction is $-42\ kJ mol^{-1}$. The activation energy for the reaction $B \to A$ would be....... $kJ\, mol^{-1}$
→
$D-(+) -$ glucose reacts with hydroxylamine and yields an oxime. The structure of the oxime would be :-
→
Standard electrode potentials of $Zn$ and $Fe$ are known to be $ (i) $ $ - 0.76\,V$ and $ (ii) $ $ - 0.44\,V$ respectively. How does it explain that galvanization prevents rusting of iron while zinc slowly dissolves away
→
Reaction   $C{H_3}CON{H_2}\xrightarrow{{NaOBr}}$  gives 
→
The Van't Hoff factor for a $0.005\, M$ aqueous solution of $KCl$ is $1.95$. The degree of ionisation of $KCl$ is
→
The equivalent conductance of monobasic acid at infinite dilution is $348\, ohm^{-1}\, cm^2\, eq^{-1}$. If the resistivity of the solution containing $15\, g$ acid ($mol.\, wt. 49$) in $1\, litre$ is $18.5\, ohm\, cm$. What is the degree of dissociation of acid? .............. $\%$
→
A reaction takes place in three steps with individual rate constant and activation energy as follows 

     Rate constant     Activation energy
 Step $1$        $k_1$ $E_{a1} = 180\ kJ/mol$
 Step $2$        $k_2$ $E_{a2} = 80\ kJ/mol$
 Step $3$        $k_3$ $E_{a3} = 50\ kJ/mol$

If overall rate constant, $k = {\left( {\frac{{{k_1}{k_2}}}{{{k_3}}}} \right)^{2/3}}$  ,then overall activation energy of the reaction will be  .......... $ kJ/mol$

→
Assertion : Resorcinol turns $FeCl_3$ solution purple.
Reason : Resorcinol have phenolic group
→
Iodine is formed when potassium iodide reacts with a solution of
→