AS & A Level Biology (9700) — October–November 2023, Paper 13
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Which statement about light microscopy is correct? A As the resolution increases, the magnification increases. B As the magnification increases, the image always becomes clearer.…
Answer this question and get it marked →The diagram shows a stage micrometer scale viewed through an eyepiece containing a graticule. The small divisions of the stage micrometer scale are 0.1 mm. The stage micrometer…
Answer this question and get it marked →What is the correct order for the involvement of the cell structures in the synthesis and secretion of an enzyme? 1 cell surface membrane 2 Golgi body 3 nucleus 4 rough…
Answer this question and get it marked →Centrioles, cilia, microtubules and microvilli are structures found in eukaryotic cells. Which statement about these cellular structures is correct? A Centrioles, cilia and…
Answer this question and get it marked →Which description of plasmodesmata is correct? A They are channels through plant cell walls, lined by the cell surface membrane. B They are channels through plant cell walls that…
Answer this question and get it marked →Which cell organelle does not have nucleic acids? A chloroplast B Golgi body C mitochondrion D ribosome
Answer this question and get it marked →Which processes occur in eukaryotes and prokaryotes? 1 hydrolysis 2 mitosis 3 transcription 4 translation A 1, 2 and 3 B 1, 2 and 4 C 1, 3 and 4 D 2, 3 and 4
Answer this question and get it marked →Which bonds are present in all viruses? 1 covalent 2 ester 3 phosphodiester A 1, 2 and 3 B 1 and 2 only C 1 and 3 only D 2 and 3 only
Answer this question and get it marked →The diagram shows the structure of a monomer (alpha-glucose). Which molecules contain this monomer? The Venn diagram has three overlapping circles labelled amylopectin, glycogen…
Answer this question and get it marked →A triglyceride consists of glycerol and three different fatty acids: linoleic acid (L), oleic acid (O) and palmitic acid (P). The diagram shows one possible arrangement of the…
Answer this question and get it marked →Which statement about phospholipid molecules is correct? A They contain one saturated fatty acid and two unsaturated fatty acids. B They contain three phosphodiester bonds. C They…
Answer this question and get it marked →Hydrogen bonding explains many of the properties of water, including the high latent heat of vaporisation and high specific heat capacity. For which processes in plants is…
Answer this question and get it marked →Which feature of cellulose molecules contributes to the function of plant cell walls? A Adjacent cellulose molecules are linked by glycosidic bonds. B Branched chains of β-glucose…
Answer this question and get it marked →Which statements describe some enzyme actions? 1 Enzymes hold reacting molecules so that their reactive groups are close together. 2 In an enzyme-catalysed reaction, more…
Answer this question and get it marked →Influenza virus has an enzyme called neuraminidase which breaks down glycoproteins in the surface membrane of the cell that the virus will infect. The glycoprotein binds to the…
Answer this question and get it marked →The graph compares the effect of temperature on the activity of the protease enzyme, papain, when in solution (free) and when immobilised in alginate beads. Which statement about…
Answer this question and get it marked →The diagram shows how adrenaline activates processes inside a cell. Adrenaline binds to a β-adrenergic receptor in the cell surface membrane, which activates a G protein that…
Answer this question and get it marked →The statements are comparisons of endocytosis and exocytosis. • Both are mechanisms that involve vesicles or vacuoles and the transport of materials across the cell surface…
Answer this question and get it marked →A student was asked to calculate the surface area : volume ratio for an agar cube with a side length of 5.5 mm. Which surface area : volume ratio is correct? A 0.2 : 1 B 0.9 : 1 C…
Answer this question and get it marked →Which statement about the behaviour of chromosomes during telophase is correct? A Chromosomes attach to the spindle fibres at the equator. B Chromosomes start to uncoil inside the…
Answer this question and get it marked →The transmission electron micrograph shows a cell in a stage of the mitotic cell cycle. Which statement explains why it is difficult to identify the stage of the mitotic cell…
Answer this question and get it marked →During lagging strand replication, short fragments of DNA are produced. The fragments are joined together by DNA ligase. Which row correctly describes the structure of these short…
Answer this question and get it marked →The genome of the bacterium Escherichia coli has been altered to enable it to code for an amino acid that is not found in nature. All the ATC DNA stop triplets on the strand of…
Answer this question and get it marked →40% of the bases in a section of a non-transcribed strand of DNA are purine molecules. What will be the total percentage of cytosine and uracil bases in the primary transcript…
Answer this question and get it marked →Which statement about xylem vessel elements is correct? A Hollow vessels enable the constant movement of water up and down a plant. B Pits enable the movement of water into…
Answer this question and get it marked →Ammonium ions, NH4+, can enter the xylem of plant roots by two pathways. • In the apoplast pathway, ammonium ions move through cell walls until this pathway is blocked by the…
Answer this question and get it marked →Which row correctly shows processes required for the movement of water from a root hair cell to the atmosphere? cohesion diffusion evaporation --- --- --- --- A ✓ ✓ ✓ B ✗ ✓ ✗ C ✓…
Answer this question and get it marked →Which process can be carried out by a mature red blood cell? A active transport B cell division C phagocytosis D protein synthesis
Answer this question and get it marked →The photomicrograph shows three white blood cells labelled X, Y and Z. Which row correctly identifies these cells? cell X cell Y cell Z --- --- --- --- A lymphocyte monocyte…
Answer this question and get it marked →When a blood vessel is damaged it can result in problems in the body. Which row identifies the blood vessel that could have been damaged? blood is not being distributed to organs…
Answer this question and get it marked →The diagram shows how tissue fluid is formed. At the arteriole end the outward blood pressure is +4.3 kPa, with -3.3 kPa water potential and additional values +1.1 kPa and -1.3…
Answer this question and get it marked →What happens when carbon dioxide is transported by red blood cells? A Hydrogencarbonate ions move into the red blood cells and chloride ions move into the plasma. B Chloride ions…
Answer this question and get it marked →What is typically found in the trachea, bronchi and bronchioles in the human gas exchange system? A cartilage B ciliated epithelium C squamous epithelium D squamous endothelium
Answer this question and get it marked →The photomicrograph shows a section through part of the human gas exchange system. Which structure is shown? A alveolus B bronchiole C bronchus D trachea
Answer this question and get it marked →Which factors are required for the efficient diffusion of oxygen and carbon dioxide in the human gas exchange system? 1 clean and warm air entering the lungs 2 maximised area of…
Answer this question and get it marked →Which statements correctly identify why it is difficult to eliminate TB? 1 Humans have limited access to clean water. 2 Humans can be infected but the pathogen can be inactive. 3…
Answer this question and get it marked →Bacteria can become resistant to antibiotics. What can help reduce the development of antibiotic resistance in bacteria? 1 Use specific antibiotics instead of wide spectrum. 2 Use…
Answer this question and get it marked →The diagram shows one way of testing the effect of an antibiotic on bacteria. A disc of filter paper soaked in antibiotic is placed on nutrient agar containing bacteria; after 5…
Answer this question and get it marked →Some responses made by cells of the immune system to a pathogen are listed. 1 mitosis 2 recognises a pathogen 3 produces memory cells 4 secretes enzymes Which responses are…
Answer this question and get it marked →Some vaccines do not contain antigens. The vaccines contain a molecule of mRNA. Cells in the immune system use the mRNA molecule to make a protein antigen. The statements describe…
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