AS & A Level Biology (9700) — October–November 2023, Paper 11
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →Until recently, the typical viruses known to science were 20-150 nm in size. In 2003, the Mimivirus was discovered with a size of approximately 680 nm. In 2013, the Pandoravirus…
Answer this question and get it marked →The diagram shows an eyepiece graticule and a cell viewed through a microscope. When the eyepiece graticule was calibrated at this magnification, the whole length of the graticule…
Answer this question and get it marked →Tay-Sachs disease results in a build-up of lipids in cells. Which cell structure does not function correctly in this disease? A Golgi body B lysosome C mitochondrion D smooth…
Answer this question and get it marked →Which animal cells would have the most extensive Golgi bodies? A ciliated epithelial cells B goblet cells C red blood cells D smooth muscle cells
Answer this question and get it marked →The diagram shows three overlapping circles, 1, 3 and 5, and the shared structures, 2 and 4. Structure 2 is shared between circle 1 and circle 3; structure 4 is shared between…
Answer this question and get it marked →Which row about the genetic material in animal cells and prokaryotic cells is correct? The table gives a tick or cross (key: tick = correct, cross = not correct) for three…
Answer this question and get it marked →What is present in all viruses? A uracil B ribose C thymine D guanine
Answer this question and get it marked →The test for non-reducing sugars requires a second Benedict's test to be carried out. Which set of steps is the correct method for carrying out the non-reducing sugar test before…
Answer this question and get it marked →The diagrams show three types of covalent bonds. Bond 1 is an ester bond (C-O-C with a C=O), bond 2 is a glycosidic bond (C-O-C between two ring sugars), and bond 3 is a peptide…
Answer this question and get it marked →Which molecules would be found in an oil (liquid) more than in a fat (solid)? Four triglyceride structures are shown. Molecule 1 has three saturated fatty acid chains (CH2)16-CH3.…
Answer this question and get it marked →Which row about the bonding found in the primary, secondary, tertiary and quaternary structure of proteins is correct? primary secondary tertiary quaternary --- --- --- --- --- A…
Answer this question and get it marked →The specific heat capacity of different substances is shown. substance specific heat capacity / J g^-1 deg C --- --- air 1.0 hydrogen gas 14.3 water (liquid) 4.2 water (steam) 2.1…
Answer this question and get it marked →The solid line on the graph represents the product formed over time for a reaction in a cell, plotted as total product formed against time. Curve A rises steeply then plateaus…
Answer this question and get it marked →The graph shows how the rate of an enzyme-controlled reaction is affected by the change in temperature, with all other variables standardised. Region X is the rising portion of…
Answer this question and get it marked →How will the removal of a reversible non-competitive enzyme inhibitor affect an enzyme-catalysed reaction? A The Km will decrease and the Vmax will increase. B The Km will…
Answer this question and get it marked →The dimensions of three agar cylinders, X, Y and Z, are summarised in the table. cylinder radius / mm length / mm --- --- --- X 2 10 Y 1 20 Z 5 5 What is the correct order of…
Answer this question and get it marked →Three individual plant leaf cells were each placed in a different solution for 30 minutes. Each solution had a different water potential. Which row correctly shows the change in…
Answer this question and get it marked →Which row is a representation of one chromosome at the beginning of prophase of mitosis and the number of DNA strands in the chromosome? Rows A and B show a chromosome made of two…
Answer this question and get it marked →Which events are part of mitosis? 1 interphase 2 telophase 3 cytokinesis A 1, 2 and 3 B 1 and 3 only C 2 and 3 only D 2 only
Answer this question and get it marked →The statements are about genes and proteins involved in breast cancer. The protein coded by the BRCA1 gene inhibits the growth of breast cancer cells. The protein coded by the p53…
Answer this question and get it marked →The photomicrograph shows a cell during mitosis, with two groups of chromosomes being drawn towards opposite poles of the cell. What is happening in this cell? 1 Chromosomes are…
Answer this question and get it marked →Which diagram correctly shows the structure of a piece of DNA? Four diagrams (A-D) show four nucleotide pairs. Each pair has a phosphate (P) and a deoxyribose pentose sugar (d) on…
Answer this question and get it marked →Bacteria were grown in a medium containing 15-N. After several generations, all of the bacterial DNA contained 15-N. Some of these bacteria were transferred to a medium containing…
Answer this question and get it marked →Which statements correctly describe the process of transcription? 1 mRNA is decoded by a ribosome to produce a specific amino acid chain. 2 A section of DNA is converted to RNA by…
Answer this question and get it marked →Sickle cell anaemia is caused by a mutation in an allele of the gene that codes for the beta-globin polypeptide of haemoglobin. The diagram shows the sequence of bases in a small…
Answer this question and get it marked →The plan diagram of a transverse section through a dicotyledonous plant stem was drawn by a student. They had stained the section with a chemical that stains lignin. The diagram…
Answer this question and get it marked →Which routes must water travel through in a plant, using the symplast pathway? 1 from soil into root hair cell vacuoles 2 from soil into root hair cell walls 3 from root hair cell…
Answer this question and get it marked →A plant leaf seen in transverse section with a microscope shows the features listed: a thick waxy cuticle on the upper surface, sunken stomata on the lower surface, and a rolled…
Answer this question and get it marked →What occurs as carbohydrate is taken out of a sink into a phloem sieve tube element? water potential in phloem sieve tube element becomes volume of liquid in phloem sieve tube…
Answer this question and get it marked →Which factors affect blood pressure? 1 the diameter of the blood vessels 2 the systolic pressure of the heart ventricles 3 the volume of blood returning to the heart in each…
Answer this question and get it marked →Sulthiame is a molecule that inhibits carbonic anhydrase. Which effect would sulthiame have inside a red blood cell in muscle tissue that is respiring at a high rate? A a decrease…
Answer this question and get it marked →The partial pressure of oxygen in blood vessels in different parts of the body affects the percentage saturation of each haemoglobin molecule with oxygen. blood vessel partial…
Answer this question and get it marked →Which statements about the Bohr shift are correct? 1 The shift is accelerated by the action of carbonic anhydrase. 2 A decrease in blood pH will cause oxyhaemoglobin to…
Answer this question and get it marked →Some of the events during a cardiac cycle are listed. 1 Left and right atria contract. 2 Left and right ventricles contract. 3 A wave of electrical activity is conducted by the…
Answer this question and get it marked →Oxygen and carbon dioxide enter and leave the blood in the capillaries of the alveoli. Which statement about this process is correct? A Oxygen and carbon dioxide only pass through…
Answer this question and get it marked →Which statement is correct? A Cholera is caused by the virus Vibrio cholerae. B Mosquitoes are pathogens that cause malaria. C Mycobacterium bovis only causes TB in humans. D…
Answer this question and get it marked →The graph shows changes in the antibiotic resistance of a species of bacterium between 2000 and 2016 in one country. Samples of bacteria were collected every year from 48…
Answer this question and get it marked →Some responses made by cells of the immune system to a pathogen are listed. 1 mitosis 2 bind to specific antigens 3 produce memory cells 4 secrete antibodies Which responses are…
Answer this question and get it marked →Which statements about uses of monoclonal antibodies are correct? 1 Monoclonal antibodies can be injected into patients to give active immunity. 2 Monoclonal antibodies can be…
Answer this question and get it marked →Which statement explains how a vaccination programme can control the spread of an infectious disease in a population? A Unvaccinated individuals are less likely to meet a…
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