General Science Class 9 MCQS

Sequence of physiological changes by which cell commit suicide?

1. Apoptosis
2. Necrosis
3. Autophagy
4. Both A and B

A type of cell division in which spore mother cell produce spores?

1. Amitosis
2. Mitosis
3. Meiosis
4. Both A and B

Stage of mitosis in which chromatids reach the poles and their movement ceases?

1. Prophase
2. Metaphase
3. Anaphase
4. Telophase

Phenomenon in which pair of homologous chromosome fails to separate called?

1. Non-disjunction
2. Terminalization
3. Synapsis
4. Linkage

Enzymes are :

1. Steroid in nature
2. Protein in nature
3. Lipid in nature
4. Carbohydrate in nature

Metabolic reactions are :

1. Constructive reactions
2. Destructive reactions
3. Inhibiting reactions
4. Both A and B

The point where the enzyme is most active is known as :

1. Neutral pH
2. Acidic pH
3. Basic pH
4. Optimum pH

Active site continuously changes it shapes until the substrate do not bind to it, is statement of :

1. Induce fit model
2. Lock and key model
3. Fluid mosaic model
4. Both A and B

Which one of the following is mismatched?

1. Proteases → Carbohydrate
2. Lipases → Lipids
3. Trypsin → Protein
4. All are correctly matched

Chemical reaction requires particular conditions to carry down at proper rate, especially?

1. Temperature and Nature
2. Nature and Pressure
3. Nature and Structure
4. Temperature and Pressure