Question

1.Endoplasmic reticulum one of the cell organelles, exists as a membranous network that extends from outer membrane of nucleus to the plasma membrane making a connection between them. Which of the following statements is not related to the endoplasmic reticulum? (a) It behaves as transport channel for proteins between nucleus and cytoplasm. (b) It transports materials between various regions in cytoplasm. (c) It can be the site of energy generation. (d) It can be the site of some biochemical activities of the cell. 2.Osmosis is a process by which molecules of a solvent tend to pass through a semipermeable membrane from a less concentrated solution into a more concentrated one. Can you pick out the option among the following which does not belong to this process? (a) The movement of water across a semipermeable membrane is affected by the amount of substances dissolved in it. (b) Membranes are made of organic molecules such as proteins and lipids. (c) Molecules soluble in organic solvents can easily pass through the membrane. (d) Plasma membranes contain chitin sugar in plants. 3.You must have observed that a fruit when unripe is green but it becomes beautifully coloured when ripe. According to you what is the reason behind this colour change. (a) Chloroplasts change to chromosplasts (b) Chromosplasts change to chromosomes (c) Chloroplasts change to chromosomes (d) Chromosplasts change to chloroplasts 4. The proteins and lipids, essential for building the cell membrane, are manufactured by: (a) Endoplasmic reticulum (b) Golgi apparatus (c) Mitochondria (d) Peroxisomes 5. Tissue is a group of similar kind of cells specialized to perform a particular function in the body. Therefore presence of tissues in a multicellular organism ensures: (a) Faster development (b) Division of labour (c) Higher reproductive potential (d) Body strength 6.Lysosome is a cytoplasmic organelle containingenzymesthat break down biological polymers. Lysosomes function as the digestive system of the cell. It is also called the suicide bag of the cell because: (a) It causes any cell to commit suicide (b) Its enzymes digest the cell itself (c) Its enzymes kill surrounding cells (d) All of the above 7. While doing work and running, you move your organs like hands, legs, etc. Which among the following is correct? (a) Smooth muscles contract and pull the ligament to move the bones (b) Smooth muscles contract and pull the tendons to move the bones (c) Skeletal muscles contract and pull the ligament to move the bones (d) Skeletal muscles contract and pull the tendon to move the bones 8.. Cardiac muscleis one of the three major types of muscles, the others being skeletal and smooth muscles. It is found in the walls and histological foundation of the heart. Which one of the following statements is not related to the cardiac muscles? (a) They muscles show rhythmic contraction and relaxation throughout life. (b) They do not work according to our will, so they are called involuntary muscles. (c) They are non-striated, multinucleated and branched muscles. (d) The contraction and relaxation of the heart muscles help to pump and distribute blood to different parts of the body. 9.Simple epithelium is a tissue, which form the outer protective layer of the skin of the animal body, is composed of cells which are (a) Hardened and provide support to organs (b) Continuously diving to provide to form an organ (c) Cemented directly to one another to form an irregular layer (d) Loosely connected to one another to form an irregular layer 10.. If the tip of the sugarcane plant is removed from the field, even then it keeps on growing in length. It is due to the presence of: (a) Cambium (b) Apical meristem (c) Lateral meristem (d) Intercalary meristem

Answer 1

Answer:

1. it is site of energy generation
2. plasma membranes contain chini sugar in plant
3. chromoplast changed to chromoplast
4. peroxisome

Answer 2

• it is site of energy generation
• plasma membrane contains chino sugar in plant
• chromoplast changed to chloroplast
• peroxide

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