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REVIEW for IB Biology
REVIEW for IB Biology
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Practice questions for the IB biology exam
Flashcards
32 cards
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Practice quiz
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Host live
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Questions
32
Answers
1
Which level of protein structure involves disulfide bonds?
Quaternary
Tertiary
Primary
Secondary
2
Where can fatty acids enter into cellular respiration?
ETC
Krebs cycle as acetyl groups
Krebs cycle as pyruvate
glycolysis
3
Which of the following affect enzyme activity?
substrate concentration
pH
All of these
Temperature
4
Which type of cells produce surfactant?
Type I leucocytes
Type II pneumocytes
Type II leucocytes
Type I pneumocytes
5
What describes hemoglobin?
tertiary and globular
tertiary and fibrous
quaternary and globular
quaternary and fibrous
6
What chemical causes inflammation and allergic symptoms?
cytokine
histamine
auxin
cyclins
7
What does the cross phosphorylation of the tails result in?
Exocytosis of the vesicles with glucose transporters
Endocytosis of the vesicles with glucose transporters
Release of glucose from the cell
Release of lipids from the cell
8
What conditions allow for formation of coral reefs?
pH above 7.8 (basic)
all of these
low water depth (50m or less)
Clarity of water
9
Why are trophic levels limited in number?
Energy is gained at each trophic level
Energy is lost at each trophic level and can not be recycled.
Energy is lost at each trophic level and can be recycled.
Energy is equal at each trophic level.
10
Which of the following are disaccharides?
lactose and galactose
Glucose and sucrose
sucrose and lactose
sucrose and cellulose
11
What is a feature of humoral immunity and not cell meditated immunity?
Plasma Cells
Killer T cells
Macrophages
T- cells
12
What are the 2 tails of the insulin receptor?
fatty acids
ATP molecules
tyrosine kinases
glucose
13
The molecule shown represents:
fatty acid
ribose
glycerol
glucose
14
What causes PKU?
Lack of enzyme conversion of tyrosine into phenylanaline
Lack of glycolysis of glucose
Build up of tyrosine in the blood
lack of enzyme conversion of phenylanaline into tyrosine
15
What hormone causes stomata to close?
Etylene
Auxin
Gibberellin
Abscisic Acid
16
Which cell membrane would contain cholesterol?
animal
mitochondrion
plant
bacterial
17
What is methane oxidized to in the atmosphere?
carbon dioxide and water
hydrogen and water
carbon dioxide only
water only
18
What molecules control the cell cycle?
Leptin
hormones
neurotransmitters
cyclins
19
What process causes Down Syndrome?
Fertilization
Crossing over
Nondisjunction
Meiosis
20
Which of the following is the CIS form of a fatty acid?
The fatty acid on the left
The amino acid on the left
The amino acid on the right
The fatty acid on the right
21
Which of the following features of prokaryotes are used to support the theory of ENDOSYMBOSIS?
ribosome size 70S
Introns in DNA
packaged DNA
ribosome size 80S
22
What process involves the movement of sodium ions passively through a cell membrane.
osmosis
facilitated diffusion
simple diffusion
active transport
23
Which of the following can freely pass through the cell membrane?
Lipids
Proteins
Glucose
Insulin
24
What process is shown in the diagram below?
condensation -anabolic
condensation - catabolic
hydrolysis - anabolic
hydrolysis - catabolic
25
What feature of an electron microscope is better than that of a light microscopes?
Cost
Resolution
Seeing living organisms
Seeing color images
26
What part of a flower produces pollen?
stigma
anther
ovary
style
27
What is the expected phenotypic ratio from a dihybrid cross?
3:1
9:3:3:1
1:1:1:1
9:4:2:1
28
A molecule with both a hydrophilic and a hydrophobic region is referred to as being:
non-polar
electronegative
polar
amphipathic
29
What is the role of auxin?
phototrophism
seed germination
closing of stomata
seed dispersal
30
How do plants respond to the environment?
both taxis and kinesis
Taxis
Tropisms
Kinesis
31
Which of the choices describes an organism with 70S ribosomes and naked DNA?
Protist
Eukaryote
Animalia
Prokaryote
32
When do cells go from diploid to haploid?
mitosis II
mitosis I
meiosis II
meiosis I
