ASSERTION-REASON TYPE
In the following questions, a statement of assertion (A) is followed by a statement of reason(R).
(1) If both Assertion & Reason are true and the Reason is the correct explanation of Assertion then mark (1)
(2) If both Assertion & Reason are true but the Reason is not correct explanation of the Assertion then mark (2)
(3) If Assertion is true statement but Reason is false, then mark (3)
(4) If both Assertion and Reason are false statements, then mark (4)
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1. A:- Mitochondria, chloroplasts and peroxisomes are not considered as the part of the endomembrane system.
R:- Functions of mitochondria, chloroplast and peroxisomes are not co-ordinated with ER, golgi complex, lysosomes and vacuoles.
2. A:- Concentration of ions is significantly hogher in the vacuole than in the cytoplasm in a plant cell.
R:- In plants, the tonoplast facilitates the transport pf a number of ions against concentration gradient into the vacuole.
3.A:- Eukaryotic cells have the ability to adopt a variety of shapes and carry out directed movements
R:- There are three principal types of protein filaments- microfilaments, microtubules and intermediate filaments, which constitute the cytoskeleton
4. A:- An eukaryotic cilium or flagellum is covered with plasma membrane.
R:- Both the cilium and flagellum emerge from centriole-like structure called the basal bodies.
5. A:- Many membranous organelles are considered together as an endomembrane system.
R:- Ribosomes are not bounded by any membrane.
6. A:- The endoplasmic reticulum bearing ribosomes on their surface is called rough endoplasmic reticulum.
R:- ER divides the intracellular space of the cell into luminal and extra luminal compartments.
7. A:- Cell membrane shows fluid behavior
R:- Membrane is a mosaic of diverse lipids and proteins
8. A:- Mitochondria and chloroplasts are semi autonomous cell organelles.
R:- They both can make their some of its proteins.
9. A:- Nucleus is the controlling centre of a cell.
R:- Pores in the nuclear envelop regulate the flow of materials in and out of the nucleus.
10. A:- Mesosome is a special membranous structure in bacteria.
R:- Mesosome helps in respiration.
11. A:- Cell wall is generally absent in plant cell.
R:- Animal cells are rigid as covered by a cell wall.
12. A:- The number of cells in a multicellular organism is inversely proportional to the size of body.
R:- All the cells in the biological world are of same size.
13. A:- Cell wall gives shape to the plant cell protect the cell and helps in cell to cell interactions.
R:- Cell wall is living rigid structure, an outer covering for the plasma membrane of fungi, animal and plants.
14. A:- Lysosomes help in the process of photorespiration.
R:- Lysosomes have alkaline enzymes.
15. A:- Mitochondria and chloroplasts have their own genome.
R:- Endoplasmic reticulum and golgi body are the cell organelles which have their own DNA.
16. A:- The matrix of mitochondria possess single circular DNA, 70S ribosomes and a few RNA molecules.
R:- Mitochondria are main sites of anaerobic respiration.
17. A:- Mitochondria are called power house of the cell.
R:- They produce cellular energy in the form of ATP.
18. A:- It is important that the organisms should have cell.
R:- A cell keeps its chemical composition steady within its boundary.19. A:- Plasmids are double-stranded extra chromosomal DNA.
R:- Plasmids are possessed by eukaryotic cells
20. A:- Plastids impart specific colours to the plants.
R:- Plastids bear some specific pigments.
ANSWER
- (1) 8. (1) 15. (3)
- (1) 9. (2) 16. (3)
- (1) 10. (2) 17. (1)
- (2) 11. (4) 18. (1)
- (2) 12. (4) 19. (3)
- (2) 13. (3) 20. (1)
- (2) 14. (4)
QUOTE:- GO CONFIDENTLY IN THE DIRECTION OF YOUR DREAMS!