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Worksheets9700_2018_MJ_QP_13_Bio
Total questions: 40
Worksheet time: 40mins
1. Which steps are needed to find the actual width of a xylem vessel viewed in transverse section using a ×10 objective lens?
1 Convert from mm to μm by multiplying by 10–3.
2 Calibrate the eyepiece graticule using a stage micrometer on ×4 objective lens.
3 Measure the width of the xylem vessel using an eyepiece graticule.
4 Multiply the number of eyepiece graticule units by the calibration of the eyepiece graticule.
1, 2, 3 and 4
1 and 2 only
2, 3 and 4 only
3 and 4 only
2. The diagram shows functions of four cell structures, W, X, Y and Z.
Which row correctly matches the cell structure with the letter representing a function?
3. Which cell structures produce ATP?
1 chloroplasts
2 mitochondria
3 nucleus
1, 2 and 3
1 and 2 only
1 and 3 only
2 and 3 only
4. When mucus is secreted from a goblet cell these events take place.
1 addition of carbohydrate to protein
2 fusion of the vesicle with the cell surface membrane
3 secretion of a glycoprotein
4 separation of a vesicle from the Golgi body
What is the sequence in which these events take place?
1 → 4 → 2 → 3
1 → 4 → 3 → 2
4 → 1 → 2 → 3
4 → 1 → 3 → 2
5. Which row could be correct for a virus?
key: √= present, x = not present
6. Which size range would include most prokaryotic cells?
A
B
C
D
7. Solutions of three biological molecules are tested for sugars. The table shows the colours of the solutions after testing.
Which solutions contained glucose before testing?
1, 2 and 3
1 and 2 only
1 and 3 only
2 and 3 only
8. A solution containing equal masses of amylose and amylopectin is completely hydrolysed.
Which molecules will be found after the hydrolysis?
α-glucose only
β-glucose only
equal masses of α-glucose and β-glucose
more α-glucose than β-glucose
9. Which molecules contain the following bonds?
10. Which feature of phospholipids enables a bilayer to form?
They are insoluble in water.
They are polar molecules.
They have hydrophobic and hydrophilic components.
They may contain saturated or unsaturated fatty acids.
11. Which description is correct for collagen?
A collagen molecule has a high proportion of the amino acid glycine, which has a very small R group.
A group of three collagen fibres forms a strong, insoluble coiled structure termed a triple helix.
Each of the collagen polypeptides in a collagen molecule has a regular spiral arrangement of many alpha helices.
Peptide bonds are present between amino acids of the different polypeptides forming the collagen molecule.
12. Which statement about the properties of water is correct?
Bonds between hydrogen atoms cause water to have a high specific heat capacity.
The high latent heat of vaporisation of water is due to the presence of hydrogen bonds.
The high specific heat capacity of water causes cooling during evaporation.
Water can dissolve amylopectin as it has hydrophilic side chains.
13. Catechol is a chemical found in a number of fruits. Catechol can be oxidised to a quinone by the enzyme catechol oxidase.
Catechol oxidase is inhibited by parahyroxybenzoic acid (PHBA) which is structurally similar to catechol.
Catechol oxidase is also inhibited by phenylthiourea (PTU) which binds to a copper atom in the enzyme.
How do both these inhibitors reduce the enzyme activity?
1 altering the specificity of the enzyme
2 competing with substrates for the active site
3 decreasing the Vmax of the reaction
1, 2 and 3
1 only
2 only
3 only
14. Four students investigated the effect of catalase on hydrogen peroxide.
Each student started a digital clock at the beginning of the experiment and stopped the clock after 25 bubbles had been counted.
The time recorded on the digital clock is shown below.
Which of the times recorded by the students is appropriate for this experiment?
1.34 minutes
1 minute 33.54 seconds
94 seconds
93.54 seconds
15. What is the effect of an enzyme in an enzyme-catalysed reaction?
decreases the activation energy and decreases the energy yield
decreases the activation energy and has no effect on the energy yield
increases the activation energy and increases the energy yield
increases the energy yield and decreases the activation energy
16. The diagram shows part of the cell surface membrane.
Which components act as antigens?
1 and 2
1 and 3
2 and 3
2 and 4
17. Which processes use energy in the form of ATP?
1 endocytosis
2 exocytosis
3 facilitated diffusion
1, 2 and 3
1 and 2 only
1 and 3 only
2 and 3 only
18. The diagram shows a partially plasmolysed plant cell.
What is found at Z?
air
solution X
solution Y
water
19. Which features of an organism are affected by a drug that stops mitosis?
1 cell repair
2 cell replacement
3 number of stem cells
4 tissue repair
5 tumour formation
1, 2, 3, 4 and 5
1, 2 and 3 only
1, 4 and 5 only
2, 3, 4 and 5 only
20. Which row shows the appearance of a chromosome at the beginning of prophase of mitosis and the number of DNA strands in the chromosome?
21. The graph shows measurements taken during one mitotic cell cycle.
Which stage of mitosis begins at X and which measurements are shown by curves 1 and 2?
22. The diagram shows the outline structure of two nucleotide bases which occur in DNA.
This pair is held together by two hydrogen bonds, shown as dashed lines.
Which row correctly identifies these two nucleotide bases?
23. DNA polymerase catalyses condensation reactions between molecules during semi-conservative replication of DNA.
Which two molecules are joined by DNA polymerase?
base and base
base and nucleotide
nucleotide and nucleotide
phosphate and deoxyribose
24. What occurs during each of DNA replication and transcription and translation?
1 ATP provides energy.
2 Condensation reactions occur to form a polymer.
3 Hydrogen bonds form between purine and pyrimidine bases.
1, 2 and 3
1 and 2 only
2 only
3 only
25. Part of a sequence of DNA from a person with a genetic disease is:
TAGTAACCACAAAGG
The corresponding sequence of DNA from a person without this genetic disease is:
TAGTAAAAACCACAAAGG
The possible mRNA codons for some amino acids are shown in the table.
Which amino acid is missing from a person with this genetic disease?
1
2
3
4
26. The photomicrograph shows a section through a plant organ.
Which statement could be used to describe this organ?
The central region of this organ has supporting tissue.
The endodermis tissue is a thick layer around the edge of the organ.
The epidermis tissue in this organ has unicellular extensions (trichomes).
The xylem tissue is found in greatest density in the centre of the organ.
27. Which diagram correctly represents part of a sieve tube element?
28. Which of the processes involved in water movement through xylem vessels depends on hydrogen bonding between water molecules?
adhesion
cohesion
evaporation
hydrostatic pressure
29. Which statements about water movement in plants are correct?
1 Water can pass through cellulose.
2 Water cannot pass through lignin.
3 Water can pass through suberin.
1, 2 and 3
1 and 2 only
1 and 3 only
2 and 3 only
30. Which blood vessel has the thickest walls?
A
B
C
D
31. Which statement about the role in the mammalian circulatory system of the heart, blood vessels and blood is correct?
The contraction of heart muscle causes blood to enter arteries that pump the blood to organs, causing the formation of tissue fluid between cells before returning to the heart in veins.
The heart connects two sets of blood vessels so that oxygen from the lungs can be distributed by red blood cells and wastes can be collected from tissues by blood plasma for removal.
The heart muscle contracts and relaxes causing blood, carrying materials from one part of the body to another, to move through blood vessels that connect the different parts of the body.
The heart provides enough pressure to push blood through arteries to capillaries between cells causing filtration of blood and the formation of tissue fluid which diffuses back into veins.
32. What explains how the maximum uptake of oxygen occurs as blood passes through the capillaries of the lungs?
Each haemoglobin molecule can temporarily bind to four oxygen atoms.
Oxyhaemoglobin formation increases the capacity of red blood cells to transport oxygen.
The binding of the first oxygen molecule to haemoglobin decreases the molecule’s affinity for binding other oxygen molecules.
The dissociation of carbon dioxide from carboxyhaemoglobin allows more haemoglobin to be available for oxygen binding.
33. At high altitudes, the oxygen content of the air may be a third of that at sea level.
As a person climbs a mountain, their body gradually adjusts to the high altitude.
What is increased during this period of adjustment?
the concentration of haemoglobin in the red blood cells
the oxygen-carrying capacity of the haemoglobin
the number of red blood cells per mm3 of blood
the rate at which haemoglobin releases oxygen to the tissues
34. What helps to maintain a concentration gradient between blood and the air in the alveolus?
the flow of blood through the lungs
the presence of haemoglobin in blood cells
the single-celled alveolar walls
the squamous epithelium of capillaries
35. The diagram shows three features found in the tissues of the gas exchange system.
Which structures of the gas exchange system could be represented at position X and at position Y in the diagram?
1 bronchiole
2 trachea
3 bronchus
36. Blood tests on people who regularly smoke cigarettes show that approximately 5% of their haemoglobin carries carbon monoxide.
People who smoke e-cigarettes inhale a vapour with no carbon monoxide. A person who smokes cigarettes regularly, switches to e-cigarettes and a blood test is carried out after a month.
Which chemical in the blood would be found in a lower concentration in this blood test?
carbaminohaemoglobin
carbonic anhydrase
carboxyhaemoglobin
hydrogencarbonate ions
37. Emphysema is a type of chronic obstructive pulmonary disease, COPD. People with emphysema have a very low level of a plasma protein which inhibits the enzyme elastase.
Elastase breaks down the elastic fibres in the bronchioles and alveoli.
Which are effects of the low levels of inhibitor in people with emphysema?
1 alveoli do not stretch and recoil properly during inhalation and exhalation
2 blood is poorly oxygenated resulting in a rapid breathing rate
3 bronchioles collapse during exhalation trapping air in the alveoli
1, 2 and 3
1 and 3 only
1 only
2 and 3 only
38. Some antibiotics work by binding to ribosomes.
Which statement explains why these antibiotics kill bacteria cells but do not kill most human cells?
mRNA in bacteria is formed in the cytoplasm from naked DNA.
The antibiotics cannot pass through human cell membranes.
The codes used for amino acids in bacteria are different from those used by humans.
The ribosomes of bacteria have a different structure from those of humans.
39. Where are antigens found?
key: √= antigens found, x= antigens not found
40. The diagram allows the identification of different types of immunity.
Which row correctly identifies the types of immunity labelled 1, 2 and 3?
