AS & A Level Biology (9700) — October–November 2024, Paper 11
40 questions · every question answerable online with instant point-by-point AI marking against the official mark scheme.
Start with Question 1 →The diagram shows a transverse section through a blood capillary. The capillary is drawn as a roughly circular outline with the wall of endothelium labelled and the lumen labelled…
Answer this question and get it marked →Which statement explains why lymphocytes with no nucleoli die?
Answer this question and get it marked →Density gradient centrifugation is used to separate cell structures by their relative density. Larger cell structures have greater density and sink further down the centrifuge…
Answer this question and get it marked →Which cell structures contain nucleic acids? 1 chloroplasts; 2 Golgi bodies; 3 lysosomes; 4 ribosomes.
Answer this question and get it marked →The statements describe processes that take place in a secretory cell. 1 Modification of the protein occurs in the Golgi body. 2 mRNA leaves the nucleus. 3 Ribosomes bind to mRNA…
Answer this question and get it marked →How many types of structures with a double membrane that are found in animal cells are also found in plant cells?
Answer this question and get it marked →A naturally occurring polysaccharide synthesised in a plant is a branched chain of alpha-glucose. The straight parts of the molecule are linked by alpha-1,6 glycosidic bonds with…
Answer this question and get it marked →The diagram shows a triglyceride. The triglyceride has three fatty acid chains esterified to glycerol: the top chain is a fully saturated chain with no carbon-carbon double bonds,…
Answer this question and get it marked →The diagram shows how the alternating nature of beta-glucose monomers along a chain allows hydrogen bonds to form between consecutive monomers within a single cellulose molecule.…
Answer this question and get it marked →Two solutions, 1 and 2, each contained a mix of two different biological molecules. One solution contained starch and sucrose, and the other contained glucose and protein. The two…
Answer this question and get it marked →The diagrams show parts of three pairs of amino acids within a protein. The pairs are labelled X, Y and Z. Pair X shows two groups, each a carbon bonded to two H atoms and an -O-H…
Answer this question and get it marked →A student carried out investigations at pH 1-8 to look at the effect of pH on an enzyme-catalysed reaction. The optimum condition for this enzyme is the acidic environment of the…
Answer this question and get it marked →Which statement is correct for a non-competitive inhibitor?
Answer this question and get it marked →Pyrophosphatase enzymes catalyse a hydrolysis reaction in which pyrophosphate ions (substrate) are converted to phosphate ions (product). In experiment 1, a scientist studied the…
Answer this question and get it marked →Proteases are a group of enzymes that digest proteins. Which statements about proteases are correct? 1 A bacterial protease that is secreted from a disease-causing bacterium could…
Answer this question and get it marked →The diagram shows part of a cell surface membrane drawn as a phospholipid bilayer. Structure 1 is a branched carbohydrate chain attached to a structure that projects from the…
Answer this question and get it marked →The diagram shows the mean dimensions of an epithelial cell in micrometres (um), drawn as a rectangular box: width 2 um, height 3 um, length 8 um. Which row shows the surface area…
Answer this question and get it marked →Which diagram shows the correct direction of net water movement between the four cells due to osmosis? Each diagram shows four cells arranged in a 2x2 block with arrows indicating…
Answer this question and get it marked →An investigation was carried out into the effect of four different treatments on the permeability of the cell surface membranes and tonoplasts of beetroot cells. Beetroot cell…
Answer this question and get it marked →The photomicrograph shows a stage of mitosis in which the chromosomes appear as a condensed mass aligned at the centre of the cell (metaphase). What would be correct for the next…
Answer this question and get it marked →What are the correct roles of mitosis? Row stem cell growth replacing lost skin cells --- --- --- A correct not correct B correct correct C not correct not correct D not correct…
Answer this question and get it marked →Which row about the stages of the mitotic cell cycle is correct? Row DNA ligase used in the nucleus RNA polymerase used in the nucleus --- --- --- A G1 phase S phase B G2 phase…
Answer this question and get it marked →Which statements describe how a gene mutation can lead to the production of a non-functional protein? 1 During transcription, an incorrect nucleotide is added to a DNA molecule. 2…
Answer this question and get it marked →There are 64 chromosomes in the muscle cells of a particular mammal. How many DNA molecules are present in a cell during early prophase and telophase of mitosis? Row early…
Answer this question and get it marked →The diagram shows the nucleotide sequence of a small section of the transcribed strand of a gene: GCG CGC GGC GCG. The table shows the amino acids coded for by 10 mRNA codons: AAG…
Answer this question and get it marked →How many hydrogen bonds form when adenine and cytosine each bind to their complementary bases? Row adenine cytosine --- --- --- A 2 2 B 2 3 C 3 2 D 3 3
Answer this question and get it marked →Which statement correctly identifies the movement of sucrose and amino acids in plant vascular tissue?
Answer this question and get it marked →Xylem vessel elements are specialised cells that are adapted for the transport of water. Which statement correctly matches an adaptation of a xylem vessel element to its function?
Answer this question and get it marked →A student makes an accurate labelled plan diagram of a section of a leaf containing a vascular bundle. Which statement correctly describes part of their plan diagram?
Answer this question and get it marked →Some babies are born with a hole between the right and left atria. These babies are found to have an increased number of red blood cells. What is the reason for this increase in…
Answer this question and get it marked →An increase in carbon dioxide in human blood shifts the oxyhaemoglobin dissociation curve to the right. What is the explanation for this effect?
Answer this question and get it marked →'Heart block' is a disease which can result in a lower than normal heart rate. A doctor treating a person with heart block found that electrical impulses were initiated as normal…
Answer this question and get it marked →The pumping action of the heart creates hydrostatic pressure in the blood. The table shows the hydrostatic pressure in a blood capillary. arteriole end of capillary / kPa venule…
Answer this question and get it marked →What is the function of cilia in the gas exchange system?
Answer this question and get it marked →Which tissues are present in the walls of a trachea and an alveolus? Row structure epithelium with goblet cells smooth muscle --- --- --- --- A trachea present present A alveolus…
Answer this question and get it marked →The photomicrograph shows part of a bronchus, with four structures labelled A, B, C and D. Label D points to the ciliated epithelium at the inner surface; label C points to a band…
Answer this question and get it marked →Which structures or compounds are present in a typical cell that can be killed by penicillin? 1 circular DNA; 2 cytoplasmic DNA; 3 70S ribosomes; 4 peptidoglycan.
Answer this question and get it marked →Three statements about cholera and its transmission are listed. 1 The pathogen causes watery faeces. 2 Frequent air flight has led to mobile populations. 3 The pathogen is…
Answer this question and get it marked →What will be produced by the division of memory cells during a secondary immune response?
Answer this question and get it marked →A vaccine is used to give immunity to the virus that causes the disease influenza. A new influenza vaccine is needed every year because the virus mutates regularly. What is the…
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