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WorksheetsEnd of SL Biology
Total questions: 70
Worksheet time: 2hrs 37mins
What type of molecule is shown in this diagram?
trans saturated fatty acid
cis unsaturated fatty acid
cis saturated fatty acid
trans unsaturated fatty acid
What characteristic shows that this steroid molecule is a lipid?
it is made of carbon rings
it has a very low proportion of oxygen to carbon
it contains OH groups as do fatty acids
it is made only of nitrogen, oxygen, and hydrogen
What is a role of cholesterol in animal cells?
it increases body fat
it controls membrane fluidity
it lines the inner wall of capillaries
it is a constituent of bile
In which compounds would a double bond link carbon to oxygen (C=O)?
I. amino acid
II. fatty acid
III. glycerol
I and II only
II and III only
I and III only
I, II, and III
A person who is 1.4 meters & 45 kg would fall under what BMI categorization?
Underweight
Normal
Overweight
Obese
Typically, in carbon compounds, how many bonds does carbon make?
3
4
5
none of the above
Which is not true about carbohydrates?
They contain oxygen and hydrogen in a 1:2 ratio.
They contain carbon, oxygen, and hydrogen.
They have hydroxyl groups.
They have carboxyl groups.
When adenine pairs with it's complementary base, how many hydrogen bonds are formed?
1
2
3
4
Which property of water would allow bugs to float on water?
Cohesion
Adhesion
Thermal
Solvent
The energy required to increase 1g of a substance 1 degree Celcius is
Boiling
Increase in energy
Freezing
Specific Heat
Which macromolecule is shown?
lipid
protein
nucleic acid
carbohydrate
Which category of organisms is correctly described in this table?
A
B
C
D
What limits the length of a food chain in an ecosystem?
The size of the individual organisms
Competition between organisms
The loss of energy between trophic levels
Natural selection
What are characteristics of species?
I and II
I and III
II and III
I, II and III
The statement is about the role of some bacteria in ecosystems. What mode of nutrition is described?
They are autotrophs
They are consumers
They are saprotrophs
They are detritivores
Who is credited for this model of the cell membrane that was predominant from the 1930s to the 1960s?
Singer and Nicholson
Davson and Danelli
Gorter and Grendel
Watson and Crick
This freeze-etched electron micrograph of the membrane suggested which piece of evidence that helped to falsify the Davson-Danelli model?
Membrane proteins are not even distributed across membranes
Membrane proteins appear to cross through the membrane
Membrane proteins make an even layer on the outside of membranes
Membranes do not have proteins
What is NOT a part of cell theory:
all cells come from existing cells
all cells have a nucleus
all living things are made of cells
cells are basic unit of structure and function in living things
Prokaryotes are
bacteria
fungi
plants
animals
Red-green colour blindness is caused by an X-linked recessive allele. In the pedigree chart below which individuals must be carriers of the red-green colour blindness allele?
Grandparent 1, parent 1
Grandparent 4 and parent 2
Parent 1 and parent 2
Child 2 and child 3
If the parents in the pedigree chart above had a fourth child who was female, what would be the probability that she was colour blind?
50%
25%
0%
None of the above
Cystic fibrosis and Huntington’s disease are inherited conditions in humans. Which row in the table correctly describes the disease causing allele in each case?
Row A
Row B
Row C
Row D
What are the enzymes used in the process of gene transfer using plasmids in bacteria?
DNA ligase and DNA polymerase
DNA polymerase and Helicase
Restriction endonuclease and DNA ligase
Helicase and Restriction endonuclease
The roundworm (Caenorhabditis elegans) has a diploid chromosome number of 12. How many chromosomes would be in a haploid roundworm cell?
24
12
6
None of the above
Which two processes are used in DNA profiling
PCR and gel electrophoresis
Gene transfer and gel electrophoresis
PCR and a Karyogram
Gene transfer and PCR
Which of the following is NOT a limiting factor for photosynthesis?
Light intensity
Concentration of CO2
Concentration of O2
Wavelength of light
Amount of water
Which statement is true about mitochondrial DNA and ribosomes?
Mitochondria do not have DNA or ribosomes - they are organelles not cells
Mitochondria have circular DNA and smaller ribosomes than eukaryotic cells - they evolved from prokaryotes.
Mitochondria have linear DNA and 80S ribosomes - they are eukaryotic cells
Mitochondrial DNA codes for all proteins needed in the electron transport chain but they use the ribosomes on the RER of the cell
Which way will the drop of liquid move in this respirometer and how do you explain it?
Left - Carbon dioxide produced in respiration is absorbed by the soda lime so the volume of gas in the tube decreases
Right - Carbon dioxide produced in respiration is absorbed by the soda lime so the volume of gas in the tube increases
No movement - the volume of CO2 produced in respiration is the same as the volume of O2 used so there is no net change
Depends - The movement will be different depending on whether the woodlice respire anaerobically or aerobically
The graph shows the changes in lactate and pyruvate measured in an athletes blood during and following a mild exercise period as compared to the period before the exercise. What do these curves suggest?
Before the exercise there was no pyruvate produced because there was no cell respiration
During the exercise there was not enough oxygen available for cell respiration so the process was partly anaerobic
During the exercise the level of lactate increased due to aerobic respiration
After the exercise the level of lactate decreased because there was enough pyruvate to be used for anaerobic cell respiration
What is a difference between aerobic respiration and anaerobic respiration in yeast?
A. Anaerobic respiration requires enzymes, aerobic respiration does not.
B. Anaerobic respiration requires glucose, aerobic respiration does not.
C. Anaerobic respiration produces ethanol, aerobic respiration does not.
D. Anaerobic respiration does not produce oxygen, aerobic respiration does.
Which of the following is an accessory organ of the digestive system?
stomach
small intestine
esophagus
liver
Which of the following answers correctly sequences the pathway food takes from the beginning to end?
mouth, esophagus, stomach, small intestine, large intestine
mouth, esophagus, stomach, large intestine, small intestine
mouth, stomach, esophagus, small intestine, large intestine
mouth, stomach, esophagus, large intestine, small intestine
Structure 5 is the
pancreas
appendix
salivary gland
gall bladder
What happens to starch in the small intestine?
Endopeptidase, secreted by the liver digests starch to enable absorption by the villi
Contraction of the intestinal muscles mixes starch with enzymes to accelerate its conversion into amylose
Glycogen secreted by the pancreas hydrolyses starch into glucose, which is eventually transported to the liver
Amylase secreted by the pancreas digests starch to enable absorption by the villi
The picture shows the layers of tissues in a transverse section of the human small intestine. Which layer is labelled with the letter X?
Mucosa
Circular muscle
Epithelium
Longitudinal muscle
Which row shows a valid comparison of arteries and veins?
A
C
B
D
What is the position of the heart valves when blood pressure is highest in the aorta?
Atrioventricular valves: open. Semilunar valves: closed.
Atrioventricular valves: closed. Semilunar valves: open.
Atrioventricular valves: closed. Semilunar valves: closed.
Atrioventricular valves: open. Semilunar valves: open.
The picture shows a human heart. Which shows the sequence of blood flow through the heart?
III ----> IV ----> I
IV ----> III ----> II
VII ----> VIII ----> I
VIII ----> VII ----> VI
If the skin is broken then a blood clot forms to seal this cut.
What is the first step in the process of blood clotting?
Fibrinogen turns into fibrin
Platelets release clotting factors
Fibrinogen is converted into thrombin
Thrombin is converted into prothrombin
Anitigens on pathogens which have got into the human body can lead to the development of specific immunity.
That is an immunity which responds only to this antigen.
Which of the following cells causes the specific immunity?
Erythrocytes
Macrophages
Lymphocytes
Phagocytes
Which muscles are used during inhalation/inspiration?
internal intercostals
external intercostals
diaphragm
external intercostals and diaphragm
The operation of the sodium-potassium "pump" moves:
sodium & potassium ions into the cell
sodium & potassium ions out of the cell
sodium ions out of the cell & potassium ions into the cell
sodium ions into the cell & potassium ions out of the cell
What generates a nerve impulse on the post-synaptic membrane?
Calcium binding with a receptor site
Potassium leaking into the post-synaptic membrane
Neurotransmitter binding with receptor sites
Neurotransmitter being removed from the synapse
What number on the graph represents the Threshold phase
1
3
4
6
The diagram shows the human male reproductive system.
Which numbers indicate a gland providing fluid for sperm (X) and a tube that transports sperm only (Y) ?
X:1 Y: 2
X:5 Y:3
X:4 Y:3
X:5 Y:2
Which is a negative feedback mechanism in the menstrual cycle?
Follicle stimulating hormone inhibits estrogen
Estrogen inhibits luteinizing hormone
Estrogen inhibits follicle stimulating hormone
Progesterone inhibits estrogen
What is the role of the hormone leptin?
To regulate the metabolic rate
To inhibit appetite
To control circadian rhythms
To increase blood sugar concentration
The hormones insulin, glucagon, thyroxin and leptin can all affect energy storage in the body. Which hormone increases the rate of energy release and use?
Insulin
Glucagon
Thyroxin
Leptin
The graph shows changes in an individual’s blood glucose concentration over time. What hormones were secreted at J and K?
Epinephrin- insulin
Insulin- Glucagon
Glucagon- Insulin
Thyroxin- epinephrin
The diagram shows the 28 days of the menstrual cycle. When does the lining of the uterus break down?
A
B
C
D
