CELL WALL AND CELL MEMBRANE

CELL WALL AND CELL MEMBRANE

1. Cell wall is thin in

a. Xylem b. Collenchyma c. Cytoplasm d. Parenchyma

2. Cell wall is absent in

a. P P L O b. Mycoplasma c. Both correct d. Both wrong

3. Glucuronic acid, galacturonic acids are found as chief components of

a. Lignin b. Pectin c. Suberin d. Glucoses

4. Maximum strength stiffness hardness and rigidity to cell wall is provided by

a. Cellulose b. Pectin c. Hemicellulose d. Lignin

5. The chemical substance in cork cell wass is

a. lignin b. chitin c. cutin d. suberin

6. The plane of cell wass formation is determined by

a. Dictyosomes b. ER c. Microtubules d. Microfilaments

7. Membranes are found in

a. Cytoplasm, mitochondria & Chloroplast b. Cytoplasm, starch grain & mitochondria

c. Cytoplasm, chromosome, mitochondria d. All correct

8. Which process requires energy?

a. Bulk transport b. Pinocytosis c. Exocytosis d. All of these

9. The process by which a cell secretes macromolecules by fusing a transport vesicles to the

plasma membrane is called

a. Pinocytosis b. Phagocytosis c. endocytosis d. emeiocytosis.

10. Death of cells occur when a heavy does of insecticide is sprayed on the leaves. It is due to

a. Killing of pathogen by insecricide b. Ex osmosis

c. Plasmolysis d. Heavy metals in insecticides kill the tissues.

11. Proteins in the membrane serve as

a. receptors b. carriers c. enzymes and energy transducers d. all correct

12. Transport proteins in bio membrane are

a. Extrinsic b. Intrinsic c. Both d. Glycoproteins.

13. The materials are carried across the cell membrane by

a. proteins b. fatty acids c. phosphates d. lipids.

14. Basic structure of all cell membranes is provided by

a. Lipid b. Protein c. Oligosaccharide d. RNA.

15. An enzyme carrier protein assoicated with cell membrane is

a. Lipse b. amylase c. permease d. catalase

16. The first lipid model of cell membrane showing that cell membrane is made up of a lipid

layer was given by

a. Garter and grendel b. Overton c. Danielli and Davson d. Lucy

17. Macula adherens (pl. Maculae adherentes) is a modification of

a. Cell wall b. Cell membrane c. ER d. Nuclear membrane

18. The cutin and suberin in cell wall are

a. Fatty substances b. Protein substances c. Carbohydrate substances

d. None of the above

19. Lignin is the important constituent in the cell wall of

a. Cambium b. Parenchyma c. Phloem d. Xylem

20. The term cell-membrane was first coined by

a. Bell b. F. Grendel c. W. Preffer d. C. Negeli

21. Element that constitute cell wall

a. Ca b. Mg c. Fe d. K

22. Phospholipid bilayer in cell membrane is

a. Solid b. Gel like c. Fibrous d. Crystalline

23. Glycocalyx is made up of

a. Oligosaccharides attached to lipids

b. Oligosaccharides attached to lipids andproteins

c. Glucose and proteins d. Glucose and related sugars.

24. Absorptive cells bear

a. Mikcrovilli b. Stereocilia c. Desmosomes d. Pseudopodis

25. A plant cell is distinguished form animal cell by the presence of

a. Cell wall b. Chloroplast c. Mitochondria d. Nucleus


ANSWERS

1. d 2. c 3. b 4. d 5. d 6. c 7. a 8. d 9. d 10. c

11. d 12. b 13. a 14. a 15. c 16. b 17. b 18. a 19. d 20. b

21. a 22. b 23. b 24. a 25. a