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WorksheetsBiological Molecules (Carbohydrates-2)
Total questions: 20
Worksheet time: 10mins
Name
Class
Date
1.
…………. Is a branched polysaccharide while …………….. Is an unbranched polysaccharide
a)
amylose, glycogen
b)
amylopectin, cellulose
c)
cellulose, amylose
d)
glycogen, amylopectin
2.
which property of water minimises temperature changes in cells and organisms
a)
cohesion
b)
heat of vaporisation
c)
maximum density at 4Oc
d)
specific heat capacity
3.
which type of reaction takes place when starch molecules are converted to reducing sugars
a)
condensation
b)
hydrolysis
c)
polymerisation
d)
synthesis
4.
The diagram shows different types of bond found in polysaccharides. Which type/types are found in amylose
a)
1 only
b)
2 only
c)
1 and 3 only
d)
2 and 3 only
5.
The diagram shows part of a molecule of a carbohydrate formed by glucose. What is the name of the molecule?
a)
amylose
b)
cellulose
c)
glycogen
d)
starch
6.
which of the following reagent can be used to test for the persence of reducing sugar?
a)
Benedit Solution
b)
Schabs solution
c)
Benedict Solution
d)
Millons Reagent
7.
which of the following describes the structure of amylopectin
a)
a branched chain with 1,2 and 1,4 glycosidic bonds
b)
a branched chain with 1,4 and 1,6 glycosidic bonds
c)
an unbranched chain with only 1,4 glycosidic bonds
d)
an unbranched chain with 1,4 and 1,6 glycosidic bonds
8.
which molecule is found in glycogen
a)
A
b)
B
c)
C
d)
D
9.
1,4 glycosidic bound is found in which molecules
a)
amylose and cellulose
b)
amylose but not cellulose
c)
cellulose but not amylose
d)
neither amylose nor cellulose
10.
which statement describes how the molecular structure of starch is suited to its function?
a)
amylose has a branced structure and amylpectin is coiled to give a compact molecule for transport
b)
in the greakdown of amylose and amylopectin, many hydrolysis reactions release stored energy
c)
in the formation of amylose and amylopectin, many condensation reactions allows the release of stored energy
d)
the final amylose/amylopectin complex in insoluble and does not affect the osmotic properties of the cell
11.
which feature distinguishes starch from glycogen
a)
starch contains alpha glucos
b)
starch contains 1,6 glycosidic bonds
c)
starch has an unbranched component
d)
starch is a polysaccharide
12.
which carbohydrate contains 1,2 glycosidic bond
a)
maltose
b)
cellobiose
c)
sucrose
d)
lactose
13.
Glycogen is a polymer of glucose. Which description summarise its structure?
a)
alpha glucose joined by glycosidic bonds involving carbons 1 and 4
b)
alpha glucose joined by glycosidic bonds invovling carbons 1, 4 and 6
c)
beta glucose joined by glycosidic bonds involving carbons 1 and 4
d)
beta glucose joined by glycosidic bonds involving carbons 1, 4 and 5
14.
which of the statements about polysaccharides can be used to describe both amylose and amylopectin? (1) contains 1,4 glycosidic bonds (2) contains 1,6 glycosidic bonds (3) polymer of alpha glucose
a)
1 only
b)
1 and 3 only
c)
2 and 3 only
d)
1,2 and 3
15.
which of the statements about polysaccharides can be used to describe both amylopectin and cellulose? (1) adjacent molecules are rotated by 180 degrees (2) contains 1,4 glycosidic bonds (3) polymer of alpha glucose
a)
2 only
b)
3 only
c)
1 and 2
d)
1 and 3
16.
X and Y represents the structures of two hexose sugars. Which statement is correct?
a)
X is found in amylopectin
b)
X is found in amylose
c)
Y is found in cellulose
d)
Y is found in glycogen
17.
what occurs when sucrose is broken down to monosaccharides?
a)
condensation of reducing sugars releasing water
b)
condensation of reducing sugar using water
c)
hydrolysis, releasing reducing sugars and releasing water
d)
hydrolysis, releasing reducing sugars and using water
18.
What differentiate the basic unit of cellulose from that of glycogen
a)
position of hydrogen atom on the fifth carbon atom
b)
position of hydrogen atom on the first carbon atom
c)
the number of carbon atoms
d)
the number of hydrogen atoms
19.
which features adapt a cellulose molecule for its function? (1) long chains of glucose molecules coil into a helix (2) many hydrogen bonds form between adjacent chains (3) it is insoluble in water
a)
1,2 and 3
b)
1 and 3 only
c)
2 and 3 only
d)
2 only
20.
Which bonds are found in glycogen?
a)
A
b)
B
c)
C
d)
D
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