Name ……………………… IB Biology Year 1 Midterm Exam
Date ….………………
IB BIOLOGY YEAR 1
Midterm Exam 2012
Saccone
PARTS I AND II
INSTRUCTION TO CANDIDATES
•
Do not open this booklet until instructed to do so.
Part 1
•
Contains 30 Multiple Choice questions. Answer all questions on the Scantron provided.
1 point awarded per question = 30 points awarded.
Part 2
• Contains 5 Short Answer questions please answer all of these questions in the space
provided on the test booklet. Points vary per question = 20 points awarded.
Total Points Parts 1 & 2 = 50 points
1
Name ……………………… IB Biology Year 1 Midterm Exam
Date ….………………
Part 1: Consists of 30 multiple choice questions to be completed on the Scantron. (30 points total)
Questions 1-4 refer to the list of processes below
1.
2.
3.
4.
I.
Active Transport
II.
Facilitated diffusion
III.
Simple diffusion
Of the above processes, which is characterized by the movement of particles from an area of
high concentration to an area of low concentration?
1.
I only
2.
I and II only
3.
I, II and III
4.
II and III only
Of the above processes, which is characterized by the movement of particles from an area of low
concentration to an area of high concentration?
1.
I only
2.
I and II only
3.
I, II and III
4.
II and III only
Of the above processes, which is characterized by the movement of particles from an area of
high concentration to an area of low concentration using channel proteins?
1.
I only
2.
II only
3.
I, II and III
4.
II and III only
Of the above processes, which is characterized by the movement of particles using exocytosis
and endocytosis?
1.
I only
2.
I and II only
3.
I, II and III
4.
II and III only
2
Name ……………………… IB Biology Year 1 Midterm Exam
5.
6.
7.
Date ….………………
The lengths of a sample of leaves were measured with a metric ruler. The mean was 30 mm.
The standard deviation of this sample was 15mm. What percent of values lie between the range
of 15 mm and 45 mm?
1.
95%
2.
68%
3.
30%
4.
15%
The lengths of a sample of leaves were measured with a metric ruler. The mean was 30 mm.
The standard deviation of this sample was 15mm. What is the uncertainty used to account for
errors in making these measurements?
1.
+/- 0.5 in
2.
+/- 0.5 mm
3.
+/- 10.0 cm
4.
+/- 0.5 m
According to cell theory all cells arise from pre-existing cells. The following diagram shows
the cell cycle of a eukaryotic (body) cell of a diploid organism.
A
B
Which of the following would take place during the region labeled B?
1.
interphase and anaphase
2.
interphase and metaphase
3.
prophase and interphase
4.
prophase and metaphase
3
Name ……………………… IB Biology Year 1 Midterm Exam
8.
9.
10.
Date ….………………
What is essential for diffusion?
1.
A concentration gradient
2.
A selectively permeable membrane
3.
A source of energy
4.
A protein
Which of the following is a characteristic of organelles?
1.
They are only found in eukaryotic cells
2.
They are only found in prokaryotic cells
3.
They are all membrane bound
4.
They are sub-cellular structures
In the diagram below macromolecules are being transported to the exterior of a cell.
What is the name of this process?
11.
1.
Endocytosis
2.
Exocytosis
3.
Pinocytosis
4.
Phagocytosis
Which of the following is required for osmosis to occur?
1.
A fully permeable membrane
2.
An enzyme
3.
A solute concentration gradient
4.
ATP
4
Name ……………………… IB Biology Year 1 Midterm Exam
12.
13.
14.
15.
Date ….………………
How do animals use cholesterol?
1.
To help in the storage of energy
2.
To increase the blood pressure during exercise
3.
To insulate neurons between nodes of Ranvier
4.
To form part of the structure of plasma membranes
What is facilitated diffusion?
1.
The movement of a particle down a concentration gradient helped by active pumping.
2.
The movement of a particle up a concentration gradient helped by active pumping.
3.
The passive movement of a particle across a cell membrane via a channel protein.
4.
The passive movement of a particle through the phospholipid bilayer of the cell
membrane.
Which of the following reactions occurs when a polysaccharide is digested to form three
molecules of glucose?
1.
Condensation
2.
Denaturation
3.
Hydrolysis
4.
Oxidation
Which of the following reactions occurs when a dipeptide is formed from amino acids?
1.
Hydrolysis
2.
Denaturation
3.
Condensation
4.
Oxidation
5
Name ……………………… IB Biology Year 1 Midterm Exam
16.
17.
18.
19
Date ….………………
The width of a human hair is 0.1 mm. What is the width in μm?
1.
10 μm
2.
100 μm
3.
1000 μm
4.
10 000 μm
Which ratio limits the size of cells?
1.
The surface area to mass
2.
The mass to volume
3.
The rate of metabolism to mass
4.
The surface area to volume
A student observes and draws an Amoeba, using the high power lens of a microscope. The
diameter of the drawing is 100 mm. The actual diameter of the Amoeba is 100 µm. What is the
magnification of the drawing?
1.
1000
2.
400
3.
100
4.
0.001
If a red blood cell has a diameter of 8 μm and a student shows it with a diameter of 40 mm in a
drawing, what is the magnification of the drawing?
1.
× 0.0002
2.
× 0.2
3.
× 5000
4.
×5
6
Name ……………………… IB Biology Year 1 Midterm Exam
20.
Date ….………………
The graph below shows the effect of changing the substrate concentration on an enzyme
controlled reaction.
40 % substrate
20 % substrate
10 % substrate
Amount of product formed
5 % substrate
2.5 % substrate
0 % substrate
Time
What is the correct interpretation of these data?
21.
22.
1.
The rate of reaction increases continuously with increase in substrate concentration.
2.
The rate of reaction decreases continuously with increase in substrate concentration.
3.
The rate of reaction increases up to a point and then remains constant.
4.
The rate of reaction is not affected by any change in the substrate concentration.
Which of the following describes the function of an enzyme?
1.
It catalyzes condensation synthesis only
2.
It catalyzes hydrolysis only
3.
It catalyzes both condensation synthesis and hydrolysis
4.
It has no effect on either condensation synthesis or hydrolysis
Which structure represents an amino acid?
1.
H
H
N
H
3.
C
OH
H
H
N
H
H
N
B.
2.
C
H
H
H
C
O
O
H
D.
4.
H
SH
H
N
H
C
OH
H
C
C
O
C
H
O
C
OH
7
Name ……………………… IB Biology Year 1 Midterm Exam
23.
Which molecule represents glucose?
A.
1.
H
C
O
H
C
H
OH H
C
C
H
3.
C.
B.
2.
CH 2 OH
OH C
24.
Date ….………………
O
H
C
H
O
C
H
N
OH
H
OH
4.
D.
H
H 2C
OH
HC
OH
C
H 2C
OH
H
O
HOH 2 C
H
C
H
H
C
C
OH
OH
OH
Which phases of mitosis are shown in diagrams I and II?
I
II
I
II
1.
anaphase
prophase
2.
metaphase
anaphase
3.
metaphase
telophase
4.
prophase
anaphase
8
Name ……………………… IB Biology Year 1 Midterm Exam
Date ….………………
Questions 25-27 refer to the diagrams below showing various molecular structures.
I.
O
(CH 2) n
CH 3
II.
O
HOH 2 C
H
C
C
C
OH
III.
H
C
H
OH
O
H
H
C
C
OH
OH
IV.
CH 2 OH
C
H H
R
H
H
C
O
N
C
H
H
OH
25.
26.
27.
C
C
H
OH
OH
C
OH
OH
Which molecule(s) contain covalent bonds?
1.
I only
2.
II only
3.
I and IV only
4.
I, II, III, and IV
Which molecule(s) represents ribose?
1.
I only
2.
II only
3.
I and II only
4.
IV only
Which molecule(s) represents a fatty acid?
1.
I only
2.
II only
3.
I and IV only
4.
I, II, III, and IV
9
Name ……………………… IB Biology Year 1 Midterm Exam
Date ….………………
Questions 28, 29, and 30 refer to the diagrams below showing various molecular
structures.
A.
I.
H
C
O
H
C
H
OH H
C
OH C
H
III.
C.
28.
29.
30.
B.
II.
CH 2 OH
C
O
H
H
C
O
C
H
N
OH
H
OH
IV.
D.
H
H 2C
OH
HC
OH
C
H 2C
OH
H
O
HOH 2 C
H
C
H
H
C
C
OH
OH
OH
Which molecule(s) contain an amino group?
1.
I only
2.
II only
3.
I and IV only
4.
I, II, III, and IV
Which molecule(s) represents a sugar?
1.
I only
2.
II only
3.
I and IV only
4.
I, II, III, and IV
Which molecule(s) contains a carboxyl group?
1.
I only
2.
II only
3.
I and IV only
4.
I, II, III, and IV
10
Name ……………………… IB Biology Year 1 Midterm Exam
Date ….………………
Part 2:
Consists of 5 multi-part short answer questions to be completed in the test booklet. (20 points total)
31.
An organelle is a discrete structure within a cell with a specific function. In the table
below, identify the missing organelles and outline the missing functions.
Name of
organelle
.............................
Structure of organelle
Function of organelle
Small spherical structures,
consisting of two subunits.
..........................................................
..........................................................
..........................................................
..........................................................
Organelles surrounded by two
..........................................................
membranes, the inner of which is
.............................
..........................................................
folded inwards.
..........................................................
Lysosome
Spherical organelles, surrounded
by a single membrane and
containing hydrolytic enzymes.
..........................................................
..........................................................
..........................................................
Region of the cell containing
chromosomes, surrounded by a
..........................................................
double membrane, in which there
.............................
..........................................................
are pores.
(2)
32.
(a)
State one function of glucose, lactose, and glycogen in animals, and of fructose, sucrose,
and cellulose in plants.
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
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...............................................................................................................................................
...............................................................................................................................................
(3)
(b)
List two functions of membrane proteins.
...............................................................................................................................................
...............................................................................................................................................
(2)
11
Name ……………………… IB Biology Year 1 Midterm Exam
33.
Date ….………………
A study was carried out to determine the relationship between the diameter of a molecule and its
movement through a membrane. The graph below shows the results of the study.
High
Relative ability to move
through a membrane
Low
0
0.4
0.8
1.2
1.6
Molecular diameter / nm
[Source: Knox, et al., Biology, Mcgraw Hill, Sydney, 1994, page 65]
(a)
From the information in the graph alone, describe the relationship between the diameter of
a molecule and its movement through a membrane.
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
.....................................................................................................................................
(2)
(b)
Compare prokaryotic and eukaryotic cells in regards to three different features.
Eukaryotic
1.
Prokaryotic
........................................................... ...........................................................
........................................................... ...........................................................
2.
........................................................... ...........................................................
........................................................... ...........................................................
.
3.
........................................................... ..........................................................
........................................................... ...........................................................
(3)
12
Name ……………………… IB Biology Year 1 Midterm Exam
34.
Date ….………………
The drawing below shows the structure of a virus.
(a)
Justify whether or not this structure supports the cell theory.
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
........................................................................................................................................... (3)
(b)
Host organisms need a variety of elements such as sulfur, calcium, phosphorus, and iron.
For these organisms, state one role for each of the elements mentioned above.
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
(2)
13
Name ……………………… IB Biology Year 1 Midterm Exam
Date ….………………
Question 35 refers to the following information.
A student in an IB Biology class collected the following data in an attempt to establish a statistically
significant relationship between the width and height of a species of Acer saccharum (sugar maple
tree)
Table 1
Sample
1
2
3
4
5
6
7
8
9
10
Width and Height of Acer saccharum leaves.
Leaf Width (mm) +/- 0.5mm
32
31
27
34
37
38
36
22
34
23
Leaf Height (mm) +/- 0.5mm
38
43
34
40
44
45
39
46
48
39
t-test value = 0.0003
35.
(a)
Explain how the t-test value should be used in exploring a statistically significant relationship
between the two sets of values.
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
...............................................................................................................................................
........................................................................................................................................... (2)
(b)
State one difference between the cells of Acer saccharum and those of an animal.
...............................................................................................................................................
........................................................................................................................................... (1)
14