Cell Structure & Size Of Specimens

9.A bacterium has a flagellum. What is the function of the flagellum?

10.Which of the following statements about bacteria is correct?

11.The actual thickness of a leaf is 2 mm. The thickness of the leaf in a diagram is 50 mm. What is the magnification of the diagram?

12.A student observes a cell under a light microscope and sees a large, central vacuole and chloroplasts. Which type of cell is most likely being observed?

13.A student measures the image of a chloroplast as 15 mm. The magnification is ×5000. What is the actual size of the chloroplast in micrometres?

14.In an experiment, beetroot cores were placed in water baths at different temperatures. The mean percentage transmission of light decreased as temperature increased. Which statement best explains this result?

15.The diagram shows a plant cell. Which labelled structure is the site of aerobic respiration?

16.A student used a cork borer to cut beetroot cores and placed them in water baths at different temperatures. After 30 minutes, the percentage transmission of light was measured using a colorimeter. What is the independent variable in this investigation?

17.A student observes a cell under a light microscope and sees a large central vacuole and chloroplasts. Which type of cell is being observed?

18.A student observed a cell under a light microscope and saw a nucleus, cytoplasm, cell membrane, and many mitochondria. Which type of cell is most likely being observed?

19.A student investigates the effect of temperature on cell membrane permeability using beetroot. Which of the following is the dependent variable?

20.Which of the following is found in plant cells but not in animal cells?

21.Which of the following structures is found in animal cells?

22.What is the main energy-releasing organelle in a cell?

23.A student observes a cell under a light microscope and sees a nucleus, cytoplasm, cell membrane, and many mitochondria. Which type of cell is most likely being observed?

24.Which of the following is a function of the nucleus?

25.Which of the following is found in both plant and animal cells?

26.What is the function of the permanent vacuole in a plant cell?

27.Which of the following is true about bacterial cells?

28.A student observes a cell under an electron microscope and sees rough endoplasmic reticulum. What is the function of the ribosomes attached to it?

29.A plant cell is 50 μm long. What is its length in mm?

30.In an experiment, beetroot cores were placed in water baths at different temperatures. The percentage transmission of light through the water was measured after 30 minutes: | Temperature / °C | Mean transmission / % | |---|---| | 0 | 99.5 | | 20 | 96.3 | | 40 | 79.6 | | 60 | 30.5 | | 80 | 0.8 | | 100 | 0.0 | What conclusion can be drawn from these results?

31.A student uses a light microscope to view a plant cell. They see a large central vacuole and chloroplasts. Which of the following statements about this cell is correct?

32.The image of a bacterium is 40 mm long. The magnification is ×8000. What is the actual length of the bacterium in micrometres (μm)?

33.Which of the following structures is found in both plant and bacterial cells but not in animal cells?

34.A student measures the length of a line AB on a photomicrograph of a bronchus as 55 mm. The actual diameter of the bronchus is 1.5 mm. What is the magnification of the photomicrograph?

35.Which of the following is found in bacteria but not in animal cells?

36.Which of the following are found in both plant and animal cells? (Select all that apply)

37.Bacterial cells have a nucleus containing their DNA.

38.Match each cell structure with its function.

39.Arrange the following levels of biological organisation from simplest to most complex.

40.A student views a cell under a light microscope and observes a large central vacuole and many chloroplasts. Which type of cell is most likely being observed?

41.Which of the following are found in plant cells but not in animal cells? (Select all that apply)

42.A student observes a cell under a light microscope and sees a cell wall, a large central vacuole, and many chloroplasts. Which of the following statements about this cell is correct?

43.Bacterial cells contain mitochondria.

44.A student measures the length of a bacterial cell in a diagram as 40 mm. The magnification is ×8000. What is the actual length of the bacterium in micrometres (μm)?

45.Complete the sentence about the levels of organisation in a multicellular organism.

46.Name the organelle that is the site of aerobic respiration.

47.The actual thickness of a leaf is 2 mm. In a diagram, the thickness is 50 mm. What is the magnification of the diagram? (Give your answer as a number, e.g., ×25)

48.A student measures the length of a palisade mesophyll cell in a photomicrograph as 75 mm. The magnification of the photomicrograph is ×2500. Calculate the actual length of the palisade mesophyll cell in micrometres (μm).

49.Explain how the structure of a root hair cell is adapted to its function of absorbing water and mineral ions from the soil.

50.A student measures the length of a bacterial cell in a diagram as 40 mm. The magnification is ×8000. What is the actual length of the bacterium in micrometres (μm)?

51.A student measures the length of a palisade mesophyll cell in a photomicrograph as 75 mm. The magnification of the photomicrograph is ×2500. Calculate the actual length of the palisade mesophyll cell in micrometres (μm).