The suggested mark is a careful word match, not a teacher’s mark. If you said the same science in different words, give yourself the mark.
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40 questions · 199 marks, in lesson order.
MRS GREN
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A flame can move and grow. Answer the parts to explain why it is still not a living thing.
What does a flame do that makes it look alive?
(1)What are all living things made of? Is a flame made of this?
(1)How does a flame release energy? Is this the same as respiration?
(1)Finish the sentence: “So moving and growing are not enough …”
(1)Total for this question: 4 marks
MRS GREN
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A toy robot moves around a room. It uses electricity from a battery. It has a sensor that detects walls and turns away from them. Lily says the robot is alive because it moves and is sensitive.
Name two life processes that living things carry out but the robot does not.
(2)A seed in a packet shows almost no life processes for months. Which statement about the seed is correct?
(1)Describe one test you could do to show the seed is alive, and the result you would expect.
(2)Total for this question: 5 marks
Observing cells
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On a micrograph, a 100 µm scale bar measures 25 mm. A cell on the same image measures 40 mm long.
Calculate the actual length of the cell. Show your working.
(4)Total for this question: 4 marks
Observing cells
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Sam is looking at onion cells with a light microscope. The eyepiece lens is ×10. The objective lenses are ×4, ×10 and ×40.
Calculate the highest total magnification Sam can use.
(1)Sam starts with the ×40 objective and cannot find the cells. What should he do first?
(1)Sam saw 4 cells side by side across the field of view. The field of view is 0.4 mm wide at this magnification. Estimate the length of one cell.
(1)Give one reason why this is only an estimate.
(1)Sam added iodine solution to the onion cells. Why did he add it?
(1)Total for this question: 5 marks
Plant and animal cells
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Answer the parts to compare a plant leaf cell with an animal cell.
Name two parts that both cells have.
(1)Name a part that only the plant cell has, which keeps it strong.
(1)Name the part that only leaf cells have, where photosynthesis happens.
(1)What does the cell wall do?
(1)Total for this question: 4 marks
Plant and animal cells
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The diagram shows an animal cell and a plant cell. Boxes X and Y point to two parts that are present in both cells.
Name the parts labelled X and Y.
(2)X is the . Y is the .
Give the names of two parts that are present in plant cells but not in animal cells.
(2)Organs can carry out their functions because of the special cells they have. A white blood cell traps micro-organisms to prevent disease. Choose the function and the process for each of the other cells.
(3)Total for this question: 7 marks
Plant and animal cells
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The diagrams show six cells, A to F.
Which two cells are plant cells? Tick two boxes.
(1)Which one of these plant cells contains chloroplasts?
(1)Give the function of chloroplasts.
(1)Which letter shows the ciliated cell?
(1)In which part of the body are ciliated cells found?
(1)What is the function of ciliated cells in this part of the body?
(1)Which letter shows the cell which transfers genetic information from the father to the offspring?
(1)Total for this question: 7 marks
Plant and animal cells
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The diagram shows a plant cell with parts labelled A to E.
Give the name and the function of part A.
(2)Give the name and the function of part E.
(2)Part B, the large vacuole, is found in plant cells but not in animal cells. Which two other parts are present in plant cells but not in animal cells? Tick two boxes.
(1)How can you tell that the cell is from a leaf and not from a root?
(1)Total for this question: 6 marks
Plant and animal cells
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The diagram shows a plant cell.
In which part of a plant would you find this type of cell?
(1)Give the function of the nucleus.
(1)Give the function of the chloroplasts.
(1)Give the function of the cell wall.
(1)Give the names of two labelled parts that are not present in animal cells.
(2)Choose whether each statement is true for photosynthesis or for respiration.
(2)Total for this question: 8 marks
Specialised cells
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A red blood cell carries oxygen around the body. Answer the parts to explain how it is good at this.
What substance fills the cell and carries oxygen?
(1)What does its dimpled disc shape give it? How does this help?
(1)Which part is missing from a red blood cell? Why does this help?
(1)So how much oxygen can it carry?
(1)Total for this question: 4 marks
Specialised cells
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The diagrams show a human ovum (egg) and a human sperm.
What are eggs and sperm?
(1)Which part does a sperm use to swim towards an egg?
(1)Total for this question: 2 marks
Specialised cells
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The diagrams show a sperm cell, a bacterium and a cell from the inner lining of the intestine.
Sperm cells are adapted for fertilisation. They use their tails to swim towards an ovum (egg). Give one other way the sperm cell is adapted for fertilisation.
(1)What is the difference between the location of the genetic material in the bacterium and in the cell from the lining of the intestine?
(1)What is the function of the genetic material in a cell?
(1)Cells in the lining of the intestine are adapted to absorb digested food. How does the folded membrane help these cells absorb the most digested food?
(1)A group of cells in the lining of the intestine is a tissue. Why is a number of sperm cells not a tissue?
(1)Total for this question: 5 marks
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