MCQOPTIONS
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MCQOPTIONS
This section includes 5751 Mcqs, each offering curated multiple-choice questions to sharpen your Biology knowledge and support exam preparation. Choose a topic below to get started.
| 2701. |
What is co – enzyme? |
| A. | Always a protein |
| B. | always a amino acid |
| C. | Often a vitamin |
| D. | Often a protein |
| Answer» D. Often a protein | |
| 2702. |
In the cell digestive enzymes are mostly in which cell organells? |
| A. | Ribosome |
| B. | vacuoles |
| C. | Lysosomes |
| D. | Mitochondria |
| Answer» D. Mitochondria | |
| 2703. |
The rate of most of enzyme catalyzed reaction changes with PH as the PH Increases this rate? |
| A. | Reaches a maximum |
| B. | Reaches a minimum |
| C. | Decreases |
| D. | Increases |
| Answer» B. Reaches a minimum | |
| 2704. |
Find out the correct function of co-enzyme? |
| A. | In association with apoenzyme and make it effective |
| B. | Independently of the apoenzyme |
| C. | In association with any protein and make it effective |
| D. | None above |
| Answer» B. Independently of the apoenzyme | |
| 2705. |
Which one is the correct group of amino acids with polar and negatively Charged –R group? |
| A. | Glutamate, Tyrosine |
| B. | Argentine, Lysine |
| C. | Tryptophan, Proline |
| D. | Glutamate, Aspartic acid |
| Answer» E. | |
| 2706. |
What is ATP? |
| A. | Pentose sugar + adenine + 3 molecule phosphate |
| B. | Hexose sugar + adenine + 3 molecule phosphate |
| C. | Amino acid + adenine + 3 molecule phosphate |
| D. | a or b both |
| Answer» B. Hexose sugar + adenine + 3 molecule phosphate | |
| 2707. |
If the one base chain sequence of DNA is ACGTTGG then what will be the base Sequence of opposite chain |
| A. | TGCAACC |
| B. | GTAGGAA |
| C. | CATGGTT |
| D. | TAGCCGG |
| Answer» B. GTAGGAA | |
| 2708. |
At which place the substrate combines with the enzymes: |
| A. | Active site |
| B. | inactive site |
| C. | Common site |
| D. | Gap site |
| Answer» B. inactive site | |
| 2709. |
Enzymes are present in which parts of plant? |
| A. | Only in leaves |
| B. | Only in fruits |
| C. | In apical meristem of root and shoot |
| D. | in all the living cell of plant body |
| Answer» E. | |
| 2710. |
Fill it E + S ________ |
| A. | E-S |
| B. | E-S complex |
| C. | product |
| D. | enzyme |
| Answer» C. product | |
| 2711. |
Near freezing point an enzyme is |
| A. | Slightly activated |
| B. | Inactivated |
| C. | Denatured |
| D. | Destroyed |
| Answer» C. Denatured | |
| 2712. |
Inorganic catalyst recognized what when it attached an enzyme? |
| A. | Activator |
| B. | Co- enzyme |
| C. | Inhibitor |
| D. | Apoenzyme |
| Answer» B. Co- enzyme | |
| 2713. |
Which of the following is the characteristic of plants… [MP PMT 2003] |
| A. | Glucose and Cellulose |
| B. | Pyruvic acid and Glucose |
| C. | Cellulose and Starch |
| D. | Starch snd Pyruvic acid |
| Answer» D. Starch snd Pyruvic acid | |
| 2714. |
Find out the Miss matched pairs: |
| A. | Protein – important compounds of nucleus |
| B. | Nucleic acid – major components of chromosomes |
| C. | Amino acid – an amphoteric compound |
| D. | Enzymes – Colloidal catalysts |
| Answer» B. Nucleic acid – major components of chromosomes | |
| 2715. |
The repeating unit of Glycogen is…… [WB JEE 209] |
| A. | Fructose |
| B. | Mannose |
| C. | Glucose |
| D. | Galactose |
| Answer» C. Glucose | |
| 2716. |
Which is an organic component found in most cells? [DPMT 2009] |
| A. | Glucose |
| B. | Lignin |
| C. | Sodium chloride |
| D. | Oxygen |
| Answer» B. Lignin | |
| 2717. |
Polypeptide chain of amino acid is: |
| A. | Nucleic acid |
| B. | Glycogen |
| C. | Protein |
| D. | Cellulose |
| Answer» D. Cellulose | |
| 2718. |
Which one of the following is incorrect for Protein: |
| A. | They transport some nutrients across cell membrane |
| B. | They are heteropolymer of amino acids |
| C. | They possess C, H, O, N and P in their constitution |
| D. | They are very important compounds of cytoplasm |
| Answer» D. They are very important compounds of cytoplasm | |
| 2719. |
Which of following elements are stored the information of Proteins? |
| A. | Lipid |
| B. | Polysaccharide |
| C. | Amino acid |
| D. | Nucleic acid |
| Answer» E. | |
| 2720. |
Amino acid is an amphoteric compound because: |
| A. | It contains an amino group and a carboxyl group |
| B. | It contains an amino group and a functional group |
| C. | It contains a functional group and a carboxyl group |
| D. | It contains one H and a-R group |
| Answer» B. It contains an amino group and a functional group | |
| 2721. |
Which of the following cell organelle is stored the information of synthesize Proteins? |
| A. | Mitochondria |
| B. | Nucleus |
| C. | Chloroplast |
| D. | Cell membrane |
| Answer» C. Chloroplast | |
| 2722. |
Total numbers of amino acids are involved in protein synthesis in Plants: |
| A. | 10 |
| B. | 22 |
| C. | 13 |
| D. | 20 |
| Answer» E. | |
| 2723. |
Which of the following is not a disaccharide? [D PMT 2007] |
| A. | Maltose |
| B. | Starch |
| C. | Sucrose |
| D. | Lactose |
| Answer» C. Sucrose | |
| 2724. |
Find out the one group of amino acids which are related with each other: |
| A. | Valine, Histidine |
| B. | Serine, Tyrosine |
| C. | Glutamate, Proline |
| D. | Lysine, Laucine |
| Answer» C. Glutamate, Proline | |
| 2725. |
The structure of protein can be destroyed by which rays |
| A. | Ultra violet rays |
| B. | Infra red rays |
| C. | Radio waves |
| D. | Micro waves |
| Answer» B. Infra red rays | |
| 2726. |
At high temperature proteins are: |
| A. | Destroyed |
| B. | inactive |
| C. | denatured |
| D. | a or b |
| Answer» E. | |
| 2727. |
Lipids are insoluble in water because lipid molecules are…… [CBSE PMT 2002] |
| A. | Neutral |
| B. | Zwitter ions |
| C. | Hydrophobic |
| D. | Hydrophillic |
| Answer» C. Hydrophobic | |
| 2728. |
Most common monomer of Carbohydrate is…… [Orissa JEE 2008] |
| A. | Glucose |
| B. | Fructose |
| C. | Sucrose |
| D. | Maltose |
| Answer» B. Fructose | |
| 2729. |
The unique property of each amino acid is determined by its particular: |
| A. | –COOH group |
| B. | –NH2 group |
| C. | –R group |
| D. | peptide bond |
| Answer» D. peptide bond | |
| 2730. |
which of the following enzyme would correct glucose in to glucose-6-phosphate |
| A. | Hydrolyses |
| B. | Lyases |
| C. | Isomerases |
| D. | Trans ferase |
| Answer» E. | |
| 2731. |
Maltose are insoluble in…… [PMT 2000] |
| A. | Water |
| B. | Alcohol |
| C. | Acid |
| D. | Basic |
| Answer» D. Basic | |
| 2732. |
Which of the following are linked together to form Proteins ? |
| A. | Phosphate |
| B. | Nitrogen base |
| C. | Sugar |
| D. | Amino acids |
| Answer» E. | |
| 2733. |
Starch and Cellulose are the compounds made up to many units of……[CPMT 1988, 89, 93, 2009] |
| A. | Simple sugar |
| B. | Fatty acid |
| C. | Glycerol |
| D. | Amino acid |
| Answer» B. Fatty acid | |
| 2734. |
Find out the correct group of co. factor which is activated enolase? |
| A. | Mg, Co, Ca |
| B. | Mg, Mn, Zn |
| C. | Co, Ca, V |
| D. | Mn, Zn, V |
| Answer» C. Co, Ca, V | |
| 2735. |
Nucleotides are building blocks of nucleic acids each nucleotide is a composite Molecule formed by [C.B.S.C. 2005] |
| A. | (base-sugar-phosphate)n |
| B. | base-sugar-OH |
| C. | base-sugar-phosphate |
| D. | sugar-phosphate |
| Answer» D. sugar-phosphate | |
| 2736. |
which enzyme would change glucose – 6 phosphate to fructose – 6 phosphate? |
| A. | Transferase |
| B. | Isomerase |
| C. | Lyases |
| D. | glucose phosphatase |
| Answer» C. Lyases | |
| 2737. |
Which is an enzyme that joins acetic acid to Co A with the help of energy? |
| A. | Acetic acid co. A Synthetase |
| B. | Ligases |
| C. | Acetyl co. A Synthetase |
| D. | No one |
| Answer» D. No one | |
| 2738. |
Which of the following sets is not co enzyme? |
| A. | NAD, FAD, ATP |
| B. | NAD, NHDP,FMN |
| C. | Fe, Cu, Zn |
| D. | V, Ca, Mg |
| Answer» B. NAD, NHDP,FMN | |
| 2739. |
the enzyme which also known as scissor? |
| A. | Lyases |
| B. | Ligarer |
| C. | Isomerases |
| D. | Trans ferasess |
| Answer» B. Ligarer | |
| 2740. |
The enzyme which break up fructose 1, 6 biphosphate in to fructose phosphates known? |
| A. | Aldolase |
| B. | Phosphatase |
| C. | Fructose phosphase |
| D. | Fructose |
| Answer» B. Phosphatase | |
| 2741. |
Co enzyme differs from prosthetic group because:- |
| A. | They deactivates the enzymes |
| B. | They do not attached with apoenzyme |
| C. | They attached apoenzyme with loosely bound |
| D. | They activates the enzymes |
| Answer» D. They activates the enzymes | |
| 2742. |
Which one is a simple protein? [Kerala 2004] |
| A. | Albumin |
| B. | Nucleoprotein |
| C. | Lipoprotein |
| D. | Glycoprotein |
| Answer» B. Nucleoprotein | |
| 2743. |
Glucose + ATP glucose – 6-phosphate +ADP which enzyme occur this reaction? |
| A. | Glucose isomerase |
| B. | Glucose oxidase |
| C. | Glucose dehydrogenase |
| D. | Hexokinase |
| Answer» E. | |
| 2744. |
which enzyme involved in hydrolysis of maltose to glucose? |
| A. | Synthetase |
| B. | maltase |
| C. | Galactose |
| D. | Lyases |
| Answer» C. Galactose | |
| 2745. |
which enzyme involved in conversion of a molecular in to an isomer? |
| A. | Lyases |
| B. | Synthetase |
| C. | Isomerase |
| D. | Transferase |
| Answer» D. Transferase | |
| 2746. |
Carbonic anhydrase is activated in the presence of which elements? |
| A. | Mb |
| B. | Mn |
| C. | Ca |
| D. | Zn |
| Answer» E. | |
| 2747. |
The best example of extra cellular enzyme is? |
| A. | Nuclease |
| B. | Digestive enzyme |
| C. | Dehydrogenase |
| D. | Lipase |
| Answer» C. Dehydrogenase | |
| 2748. |
A non-protein component of enzyme is called? |
| A. | Co-factor |
| B. | Activator |
| C. | Co-enzyme |
| D. | Inhibitor |
| Answer» B. Activator | |
| 2749. |
What ‘A’ and ‘B’ indicates in the given figure (reaction)? |
| A. | A= ES complex B=S |
| B. | A=S B=E |
| C. | A= ES complex B=E |
| D. | A= EP complex, B=E |
| Answer» D. A= EP complex, B=E | |
| 2750. |
Which one is not a co. Enzyme? |
| A. | NAD |
| B. | NADP |
| C. | FAD |
| D. | ADP |
| Answer» E. | |