AS Biology 9700 | May/June 2024 Paper 12 | Past Paper Solution | Part 1 | @biologybyhr

In this video I am solving AS level biology pastpaper paper 1.
Timecodes
0:00 - Intro
00:20 - Q1 A prokaryotic cell which is 1 m in diameter is magnified 50 000 times in an electron micrograph. What is the diameter of the cell in the electron micrograph?
2:18 - Q2 Which labelled structures are bound by a double membrane?
3:49 - Q3 Which size of ribosome is found in mitochondria and typical prokaryotic cells?
4:36 Q4 Which row about typical prokaryotic cells and typical animal cells is correct?
6:37 - Q5 Which row is correct for the structures present in typical plant cells and typical animal cells?
8:31 - Q6 Which row is correct for cellulose?
10:57 - Q7 Which statements about peptide bond formation are correct?
13:18 - Q8 The diagram shows naturally occurring D-glucose and a form of glucose that can be synthesised in the laboratory, known as L-glucose.
15:06 - Q9 Which solutions would contain either sucrose or amylase?
16:59 - Q10 Which row describes the expected effect on Vmax and Km when a competitive reversible inhibitor is
added to an enzyme-catalysed reaction?
20:08 - Q11 What is the correct order of affinity of these enzymes for their substrates, starting with the enzyme with the highest affinity?
24:10 - Q12 Which row correctly identifies the weak and strong bonds in the tertiary and quaternary structure of a typical protein?
26:09 - Q13 Which row correctly describes haemoglobin?
28:37 - Q14 Which process always takes place without the involvement of energy from ATP?
29:22 - Q15 Which row shows a property of molecule X and the effect of the concentration of ATP in the cytoplasm on the rate of entry of molecule X?
31:29 - Q16 The electron micrograph shows some human blood cells.
33:44 - Q17 A red indicator solution was mixed with agar and the resulting solid was cut into small cylindrical blocks. The blocks were placed in an acid which turns the indicator yellow and all other variables were kept constant. The dimensions of the blocks are shown.
36:32 - Q18 Which metabolic processes will be very active in a cell that has just completed cytokinesis?
38:11 - Q19 The diagram shows a typical mitotic cell cycle and the point in the cell cycle that has been reached by each of four cells, V, W, X and Y
41:18 - Q20 The graph shows the mean length of the spindle fibres during mitosis.
Which region of the graph shows when all the centromeres have detached from the spindle
fibres?

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