Select the correct statement from the following regarding cell membrane.

(a) Na+ and K ions move across cell membrane by passive transport

(b) Proteins make up 60 to 70% of the cell membrane

(c) Lipids are arranged in a bilayer with polar heads towards the inner part

(d) Fluid mosaic model of cell membrane was proposed by Singer and Nicolson

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Important site for formation of glycoproteins and glycolipids is

(a) Golgi apparatus

(b) plastid

(c) Lysosome

(d) vacuole

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Which one of the following also act as a ribozyme in a bacterial cell?

(a) snRNA

(b) hn RNA

(c) 23 S rRNA

(d) 5 S rRNA

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In eubacteria, a cellular component that resembles eukaryotic cells is

(a) nucleus

(b) ribosomes

(c) cell wall

(d) plasma membrane

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Peptide synthesis inside a cell takes place in

(a) mitochondria

(b) chromoplast

(c) ribosomes

(d) chloroplast

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Which one of the following structures between two adjacent cells is an effective transport pathway?

(a) Plasmodesmata

(b) Plastoquinones

(c) Endoplasmic rcticulum

(d) Plasmalemma

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Which one of the following has its own DNA?

(a) Mitochondria

(b) Dictyosome

(c) Lysosome

(d) Peroxisome

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The main arena of various types of activities of a cell is

(a) plasma membrane

(b) mitochondrion

(c) cytoplasm

(d) nucleus

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The plasma membrane consists mainly of

(a) phospholipids embedded in a protein bilayer

(b) proteins embedded in a phospholipid bilayer

(c) proteins embedded in a polymer of glucose molecules

(d) proteins embedded in a carbohydrate bilayer

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Stroma in the chloroplasts of higher plants contains

(a) light-independent reaction enzymes

(b) light-dependent reaction enzymes

(c) ribosomes

(d) chlorophyll

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