WorksheetsIB Biology SL 2.4-2.7
Total questions: 15
Worksheet time: 13mins
Name
Class
Date
1.
A permanent change to the shape of a protein caused by the breaking of stabilizing bonds (h bonds) and interactions between R groups of their amino acids.
a)
Denaturation
b)
Dipeptide
c)
Condensation
d)
Collagen
2.
A structural protein that forms strong fibers, found in skin, connective tissue and bone (the most abundant protein in the animal kingdom).
a)
Insulin
b)
Immunoglobulins
c)
Rhodopsin
d)
Collagen
3.
A 4 polypeptide globular protein in red blood cells.
a)
Integrin
b)
Hemoglobin
c)
Lysozyme
d)
Rubisco
4.
Which molecule is a polysaccharide?
a)
Cellulose
b)
Fructose
c)
Maltose
d)
Sucrose
5.
Which molecule is a monosaccharide?
a)
Cellulose
b)
Starch
c)
Fructose
d)
Maltose
6.
Which correctly identifies the parts labelled I and II?
a)
I-base II-phosphate
b)
I- ribose II- uracil
c)
I- deoxyribose II- base
d)
I- ribose II-adenine
7.
Which of the following nitrogenous bases is found in DNA, but is not found in RNA?
a)
Uracil
b)
Adenine
c)
Thymine
d)
Guanine
8.
The two strands of a DNA double helix are held together by:
a)
hydrogen bonds
b)
peptide bonds
c)
covalent bonds
d)
ionic bonds
9.
DNA is made up of a phosphate group, an organic base, and __________.
a)
a molecule of ATP
b)
a sugar
c)
an amino group
d)
glycerol
10.
Analysis of the DNA of an organism reveals that it is composed of 20% T (thymine). Based on this information, what would you predict the % C (cytosine) to be?
a)
60%
b)
30%
c)
20%
d)
10%
11.
Select all factor that can cause denaturation?
a)
PH level
b)
Concentration
c)
Temperature
d)
Shape
12.
Where do substrates bind on an enzyme?
a)
voltage-gated channels
b)
surface receptor
c)
calcium channels
d)
active site
13.
How do enzymes speed up chemical reaction?
a)
Increasing activation energy
b)
Decreasing activation energy
c)
Increasing deactivation energy
d)
Decreasing deactivation energy
14.
Which of the following conclusions can be drawn from this graph?
a)
The optimum pH of the enzyme is 6.6.
b)
The optimum pH of the enzyme is 5.8
c)
The enzyme’s activity increases as pH increases 5.0 to 9.0
d)
The enzyme’s activity is greater around pH of 8.0 .
15.
Enzymes are composed of which of the following monomers?
a)
amino acids
b)
carbohydrates
c)
nucleotides
d)
monosaccharides
100 %
