MULTIPLE CHOICE QUESTIONS: Mark your answer choice on the SCANTRON form with a #
ID: 146283 • Letter: M
Question
MULTIPLE CHOICE QUESTIONS: Mark your answer choice on the SCANTRON form with a # 2 pencil. 1. Which of the following is the function of a-glucose in the cells of living organisms? serves as a source of energy for cells b. helps protect vital organs from damage c. contains the genetic information of a cell d. serves as structural components of human cells e. forms the regulatory molecules known as enzymes 2. Which of the following is a storage polysaccharide commonly found in the cells of plants? a. Glucose b. sucrose starch d. glycogen e.cellulose Which of the following functional groups can act as acids within the water environment of cells? a. carbonyl b. carboxyl c. hydroxyl damino e. methyl 4. Which of the following are molecules that have the same molecular composition but differ in structure and/or bonding iation? al) Isotopes b. ions c. free radicals d. catalysts e. isomers 5. Cellulose is composed of which of the following monosaccharides covalently bonded to 6. The cell wall of plant cells is composed of whiçh of the following? 7. Which of the following are common carbohydrates for energy storage in animal cells? a long chain? Alpha glucose b. Amino acids c. Beta glucose a. eptidoglycan e. Phospholipids a. Chitin b. Cellulose c. Peptidoglycan hospholipid bilayer e.Fibronectins and glycoproteins a. phospholipids starch c. glycogen d. cholesterol e.triglyceridesExplanation / Answer
1.Functions of glucose: Source of energy in all organisms and used for metabolism
Option (a) is best suited.
(b) Fat body(cholesterol) helps protect vital organs from damage
(c) Chromosomes contain genetic information of cell.Chromosomes contain genes which is a section of DNA.So genes are needed to contain genetic information
(d) Proteins serve as structural components of cells i.e formed by long chain amino acids and from as moving materials across membrane
(e) Ribozymes are also known as enzymes and most enzymes are proteins. Enzymes catalyze the biochemical reactions.
2. c.Starch is the answer
The polysaccharides are the polymeric carbohydrate molecules.They are composed of long chains of monosaccharide units bound together by linkages (glycoside and hydrogen).There are two types:Structural polysaccharides and storage polysaccharides.
Starch:polymer of glucose is used as storage polysaccharide in plants found as amylose and amylopectin
Glycogen: it is a polymer of glucose present in the animal cells also known as animal starch.
Cellulose: structural polysaccharide present in the cell walls of plants and other organisms
6. Option b
Cell wall of plant cells: the cell wall in plants is composed of cellulose which is a structural carbohydrate and known as complex sugae.It is used in both protection and structure.
Chitin:Fungal cell walls are made of chitin
Peptidoglycan : Bacterial cell wall is composed of peptidoglycan
Phospholipid bilayer: The plasma membrane is arranged in the form of two phospholipid layers .Hence the name phospholipid bilayer
Fibronectins and glycoproteins : The third layer of wall in Archae consistes of glycoproteins.
7. Common carbohydrate for energy storage in animal cells: option c
Phospholipid: The plasma membrane is arranged in the form of two phospholipid layers.They help in the cells ability to function.
Starch: Energy storage in plants
Glycogen: energy storage in animals
Cholestrol: fat body in humans
Triglycerides : Body fat in humans.
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