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WorksheetsIB Biology Unit 2 Study Guide
Total questions: 28
Worksheet time: 56mins
Name
Class
Date
1.
What property of water makes it suitable as a coolant?
a)
Water is a good solvent so it can transport heat from the body
b)
Water molecules are cohesive and stick to the skin.
c)
It takes a lot of energy for water to evaporate
d)
It takes a lot of energy to increase the temperature of water.
2.
What is a difference between carbohydrates and lipids in energy storage?
a)
Carbohydrates are used for long term storage and lipids for short term storage.
b)
Carbohydrates contain more energy per 100g than lipids
c)
Carbohydrates store food only in plants whereas lipids store food in plants and animals.
d)
Carbohydrates are more easily transported to where energy is required than lipids.
3.
Which molecule is a polysaccharide?
a)
Cellulose
b)
Fructose
c)
Maltose
d)
Sucrose
4.
What are the most frequently occurring elements in living organisms?
a)
nitrogen, carbon, oxygen and hydrogen
b)
carbon, phosphorus, oxygen and nitrogen
c)
calcium, sodium, nitrogen and phosphorus
d)
calcium, phosphorus, iron and sodium
5.
Which molecule is a monosaccharide?
a)
Cellulose
b)
Starch
c)
Fructose
d)
Maltose
6.
What type of Molecule?
a)
A
b)
B
c)
C
d)
D
7.
Which molecules show a monosaccharide and a fatty acid?
a)
A
b)
B
c)
C
d)
D
8.
Why does exposure to high temperatures cause an enzyme to lose its biological properties?
a)
The substrate blocks the active site at high temperatures
b)
The three dimensional structure of the enzyme becomes changed
c)
Chemical reactions cannot take place at high temperatures
d)
High temperatures increase the activation energy of reactions.
9.
Molecules A and B are amino acids and C is a dipeptide. Which reaction represents a condensation reaction?
a)
A
b)
B
c)
C
d)
D
10.
How can the activity of a human amylase enzyme be increased during a laboratory experiment?
a)
Adding sugar to the mixture
b)
Decreasing the pH from 7 to 3C.
c)
Increasing the temperature from 20°C to 37°C
d)
Adding water to the mixture
11.
What contributes to the structure of an enzyme?
a)
Sequence of bases linked by hydrogen bonds
b)
Sequence of substrates linked by condensation reactions
c)
Sequence of amino acids linked by peptide bonds
d)
Sequence of polypeptides linked by hydrolysis reactions
12.
Which is the activation energy of a reaction when it is catalyzed by an enzyme?
a)
A
b)
B
c)
C
d)
D
13.
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
14.
What provides evidence for the universal nature of the genetic code?
a)
mRNA codons are assigned to the same amino acids in different species
b)
The amount of A is equal to the amount of T and the amount of G is equal to the amount ofC
c)
Nucleic acids contain the same bases in all species
d)
Uracil replaces thymine in RNAB.
15.
What is “naked DNA”?
a)
DNA not surrounded by a nuclear envelope
b)
DNA that is single-stranded due to heat treatment
c)
DNA not associated with proteins
d)
DNA not super-coiled into chromosomes
16.
How is the sequence of DNA conserved?.
a)
Unwinding of the double helix by helicase during DNA replication
b)
Separation of sister chromatids to opposite poles during mitosis
c)
Transcription into complementary RNA for protein synthesis
d)
Complementary base pair matching during DNA replication
17.
Organisms can be genetically modified to produce the human blood clotting factor IX.What characteristic of the genetic code makes this possible?
a)
It is conservative
b)
It is degenerate
c)
It is complementary
d)
It is universal.
18.
Which molecules are formed as a direct result of translation and transcription?
a)
A
b)
B
c)
C
d)
D
19.
Which model represents transcription?
a)
A
b)
B
c)
C
d)
D
20.
Which sequence represents the order of events in protein synthesis?
a)
A
b)
B
c)
C
d)
D
21.
What helps to regulate transcription?
a)
Nucleosomes
b)
DNA Polymerase
c)
tRNA
d)
Ribosomes
22.
In this electronmicrograph of a eukaryotic nucleus, what could be happening to DNA at any of the arrows?
a)
Transcription
b)
Translation
c)
Replication
23.
What happens during glycolysis for one molecule of glucose?
a)
Two pyruvates are formed
b)
There is a net gain of two NADPH + H+
c)
There is a net loss of two ATP
d)
Two acetyl CoA are formed
24.
What is produced overall per glucose molecule, during glycolysis?
a)
1 pyruvate 2 ATP 1 NADH
b)
1 pyruvate 4 ATP 2 NADH
c)
2 pyruvate 4 ATP 1 NADH
d)
2 pyruvate 2 ATP 2 NADH
25.
What substance is produced from glucose during anaerobic respiration in all organisms?
a)
Carbon dioxide
b)
Ethanol
c)
Lactate
d)
Pyruvate
26.
How can the rate of photosynthesis be measured?
I. By the amount of oxygen produced
II. By the increase in biomass
III. By the amount of carbon dioxide produced
I. By the amount of oxygen produced
II. By the increase in biomass
III. By the amount of carbon dioxide produced
a)
I
b)
I & II
c)
I & III
d)
I, II & III
27.
How does chlorophyll respond to the red, green and blue wavelengths in white light?
a)
A
b)
B
c)
C
d)
D
28.
What is the source of the oxygen released into the atmosphere in photosynthesis?
a)
Glucose
b)
CO2
c)
Water
d)
Chlorophyll
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