Here are the answers to the questions: Q. 9. Cell consists on ____ percent of water? a) 10_20 b) 30_40. c) 45_65 d) 65_80 Cells are primarily composed of water, typically ranging from 65% to 80%. The correct option is d). $\boxed{\text{d) 65\_80}}$ Q. 10. The outer covering of human cell is called ____? a) Cell wall b) Cell membrane c) Cell cytoplasm d) Mitochondria The outer covering of a human cell (an animal cell) is the cell membrane. The correct option is b). $\boxed{\text{b) Cell membrane}}$ Q. 11. Thickness of cell membrane is ____? a) 2-4 cm b) 4_8 um c) 8_10 nm d) 6_8 mm The cell membrane is very thin, typically measuring about 7-10 nanometers (nm) in thickness. The correct option is c). $\boxed{\text{c) 8\_10 nm}}$ Q. 12. ____ is lipid bilayer in nature? a) Cell wall b) Cell membrane c) Ribosome d) Cytoplasm The cell membrane is composed of a phospholipid bilayer. The correct option is b). $\boxed{\text{b) Cell membrane}}$ Q. 13. Which of the following is the component of cell membrane? a) Protein b) Lipid c) Carbohydrates d) All The cell membrane is made up of lipids (phospholipid bilayer), proteins, and carbohydrates. The correct option is d). $\boxed{\text{d) All}}$ Q. 14. ____ is the part which surrounds the cell nucleus and lies near to cell membrane? a) Cytoplasm b) Endoplasmic reticulum c) Mitochondria d) Golgi body The cytoplasm is the jelly-like substance that fills the cell, surrounding the nucleus and extending to the cell membrane, containing various organelles. The correct option is a). $\boxed{\text{a) Cytoplasm}}$ Q. 15. Zone of cytoplasm near to nucleus is called ____ while near to cell membrane is called ____? a) Endoplasm, ectoplasm b) Ectoplasm, endoplasm c) Cytosol, endoplasm d) None of these The inner, more fluid part of the cytoplasm near the nucleus is called the endoplasm, and the outer, more gel-like part near the cell membrane is called the ectoplasm. The correct option is a). $\boxed{\text{a) Endoplasm, ectoplasm}}$ Q. 16. ____ is the clear fluid where all the organelles are present? a) Nucleus b) Mitochondria c) Tissue d) Cytosol The cytosol is the clear, jelly-like fluid portion of the cytoplasm in which organelles are suspended. The correct option is d). $\boxed{\text{d) Cytosol}}$ Q. 17. Which of the following is not the part of cytoplasm? a) Cytosol b) Mitochondria c) Nucleus d) Golgi bodies The cytoplasm consists of the cytosol and organelles like mitochondria and Golgi bodies. The nucleus is a distinct major organelle, separate from the cytoplasm. The correct option is c). $\boxed{\text{c) Nucleus}}$ Q. 18. ____ is a series of tubular portion in the cytoplasm? a) Mitochondria b) Nucleus c) Endoplasmic reticulum d) Ribosomes The endoplasmic reticulum is a network of membranes forming sacs and tubules within the cytoplasm. The correct option is c). $\boxed{\text{c) Endoplasmic reticulum}}$ Q. 19. Granular part of endoplasmic reticulum is called ____ while Agranular part is called ____? a) Smooth E.R, rough E.R b) Rough E.R, smooth E.R c) cytosol, rough E.R d) Rough E.R, cytosol The granular part of the endoplasmic reticulum, which has ribosomes attached, is called the rough endoplasmic reticulum (RER). The agranular part, which lacks ribosomes, is called the smooth endoplasmic reticulum (SER). The correct option is b). $\boxed{\text{b) Rough E.R, smooth E.R}}$ That's 2 down. 3 left today — send the next one.