D. Osmosis 38. The site of peotein synthesia B. Chl C. Golgi Apparatus D. Riboso

Question

D. Osmosis 38. The site of peotein synthesia B. Chl C. Golgi Apparatus D. Ribosome 39. A cell organelle not enclosed by a membrane A. Nucleus B. Mitochondriorn C. Centriole D. Lysosome 40. A specialized integral protein involved in maintenance of cellular polarity A. Lysosomal acid phosphatase B. Phosphofrucokinase C. Hemoglobin D. Na+/K+ ATPase The cell membrane (plasmalemma) is a Trilaminar structure containing proteins, fats, sugars and fatty acids -41· A. B. Phospholipid bilayer C. D. Barrier that prevents entry of all molecules into the cell Single layer of bipolar lipid molecules 42. A. B. C. The cell organelle that is the site of oxidative respiration Nucleus Ribosome Mitochondrion D. Smooth endoplasmic reticulum 43. An example of a cell that uses phagocytosis is the A. Red Blood cell B. Erythrocyte C. Muscle cell D. White blood cell 44. The phase of mitosis in which the chromosomes first become visible A. Telophase B. Interphase C. Metaphase D. Prophase 45. A. The terminal or end phase of mitosis Metaphase Telophase C. Anaphase D. Interphase B. 46. A. The product of translation B. C. D. Phospholipids mRNA (messenger RNA) DNA Proteins

Explanation / Answer

38. Ribosomes are cell organelles found in prokaryotic and eukaryotic cells.

They are responsible for synthesing of protein.

Ribosomes can be free or membrane bound.

So the answer is (C) ribosomes

39. Membrane bound organelles are enclosed in a cell membrane.

Non membrane bound cell organelles do not have membrane.

Nucleus, mitochondria and lysosomes are membrane bound.

Centriole is non membrane bound cell organelle

So the answer is centriole

40. Na+/K+ ATPase is responsible for maintaining tight junctions and cell polarity is epithelial cells

So the answer is (D)

41. Cell membrane encloses the cells.

It protects the cell from external environment by acting as a separator between the cell and external environment.

It is made up of phospholipid bilayer.

So the answer is (B)

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