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  • Investigating Cells Homework Booklet 20/07/2011

    Hyndland Secondary School 1 Biology Department

    Hyndland Secondary School

    Biology Department

    Investigating Cells

    Homework and Question Booklet1 Investigating Cells (a) Investigating Living Cells.............................................................. 2

    Investigating Cells (b) Investigating Diffusion ................................................................ 5 Diffusion ................................................................................................................... 5 Osmosis ................................................................................................................... 5

    Investigating Cells (d) Investigating Enzymes .................................................................. 10 Enzyme Mechanisms & Investigation .................................................................... 10 Optimum Conditions .............................................................................................. 12 Problem Solving ..................................................................................................... 15

    1 This booklet is available online from the Hyndland Secondary School website. Any grids for graphs are also

    available on the site should you wish them for practice. There is also a handy hints booklet which will help you

    should you get stuck, where appropriate this booklet also includes links to websites giving a more general help with

    the section. Answers booklet will also be made available when the section has been completed in class. http://www.hyndland-sec.glasgow.sch.uk/PlainText/PlainText.aspx?SectionId=a0e6692f-ea72-48f6-b58f-cc274d47160b

  • Investigating Cells Homework Booklet 20/07/2011

    Hyndland Secondary School 2 Biology Department

    Investigating Cells (a) Investigating Living Cells Marks

    1.

    2.

    3.

    4.

    5.

    What are the basic units of life?

    Why do we need to use stains when looking at plant and animal cells under

    the microscope?

    Draw and label a diagram of an animal cell.

    Draw and label a diagram of a plant cell.

    State the function of the following parts of a cell:

    a. Cell Membrane

    b. Cell Wall

    c. Cytoplasm

    d. Nucleus

    e. Vacuole

    f. Chloroplast

    (1)

    (1)

    (1)

    (1)

    (3)

    6. The diagram below represents a plant cell as seen under a microscope.

    What are the parts (i) and (ii)?

    From the diagram, select one piece of evidence that this a plant cell.

    (2)

    7. The diagrams below show some human cheek cells as they appeared under

    the microscope, at two different magnifications.

    Describe the effect that increasing the magnification had on:

    a) the apparent size of the cells.

    b) the area of the slide seen.

    (1)

    (1)

    (i)

    (ii)

  • Investigating Cells Homework Booklet 20/07/2011

    Hyndland Secondary School 3 Biology Department

    2. The diagram below shows some of the structures of a typical plant cell

    8. The diagram below shows some of the structure of a typical plant cell. 2. The diagram below shows some of the structures of a typical plant cell

    One important structure is missing from the diagram.

    Copy the diagram into your jotter and add and label the missing

    structure.

    (1)

    9.

    The diagram below shows some human cheek cells as they appear when

    viewed through a microscope.

    The diameter of the field of view of the

    microscope is 120 micrometres.

    a) Calculate the average width of a human

    cheek cell.

    (1)

    10.

    The diagram below shows a single-celled organism that lives in ponds.

    .

    Provide the information to

    complete the table.

    Letter Structure Function

    A (i) Controls the work of the cell

    B Cell Membrane (ii)

    (2)

    11. a) Name two features only found in plant cells.

    b) Describe how cells can be treated so that the cell contents

    become more visible.

    c) Cells increase in number by cell division. Name the part of the cell

    which controls cell division.

    (1)

    (1)

    (1)

    2. The diagram below shows some of the structures of a typical plant cell

  • Investigating Cells Homework Booklet 20/07/2011

    Hyndland Secondary School 4 Biology Department

    12. Use the information in the table below to answer the following

    questions about simple aquatic organisms.

    Each organism consists of a single cell.

    Appearance

    (not drawn to scale)

    Average

    Cell length

    (mm)

    Features

    1

    Move by making the

    cytoplasm flow in any

    direction.

    Feed by flowing around

    smaller organisms.

    0.1

    Move by a whipping action

    of the long flagellum.

    Make food by

    photosynthesis

    0.2

    Move by rhythmical

    beating of rows of cilia.

    Feed by taking food

    particles into the gullet

    and then into the

    cytoplasm

    a) Which organism has the smallest cells?

    b) Which organism does not contain food vacuoles?

    c) Which organism moves using cilia?

    d) Euglena carries out photosynthesis. Describe one way in which

    Euglena differs from typical green plant cells

    (1)

    (1)

    (1)

    (1)

  • Investigating Cells Homework Booklet 20/07/2011

    Hyndland Secondary School 5 Biology Department

    Investigating Cells (b) Investigating Diffusion

    Diffusion

    15.

    16.

    17.

    18.

    19.

    State what is meant by diffusion.

    Name 3 substances that can move by diffusion.

    Which part of the cell controls the entry and exit of substances by

    diffusion.

    Why is diffusion important to living organisms?

    The list below names three substances which diffuse into or out of an

    animal cell.

    Oxygen

    Carbon Dioxide

    Dissolved Food

    State which of these would diffuse in and which would diffuse out of the

    animal cell.

    (1)

    (1)

    (1)

    (1)

    (1)

    Osmosis

    20.

    21.

    22.

    23.

    24.

    25.

    What is the difference between osmosis and diffusion?

    State what is meant by osmosis.

    Describe what happens to a plant cell placed in distilled water.

    Describe what happens to a plant cell placed in a strong sugar

    solution.

    Describe what happens to an animal cell placed in distilled water.

    Describe what happens to an animal cell placed in a strong sugar

    solution.

    (1)

    (1)

    (1)

    (1)

    (1)

    (1)

  • Investigating Cells Homework Booklet 20/07/2011

    Hyndland Secondary School 6 Biology Department

    26.

    Diagram 1 below shows an onion cell in 10% sugar solution.

    Diagram 2 below shows the same cell.

    What treatment could have caused the change shown?

    (1)

    27.

    The diagram below shows a model of a cell using Visking tubing.

    Copy and complete the sentence below, choosing the correct word to

    make the statement correct.

    There is an overall movement of sugar INTO/ OUT OF the bag by

    DIFFUSION/ OSMOSIS.

    (1)

    28. The concentration of some substances inside and outside three cells is

    shown in the diagrams below.

    Use the numbers to identify the cells in which the following would occur.

    a) Diffusion of the substance into the cell

    b) Osmosis

    (1)

    (1)

  • Investigating Cells Homework Booklet 20/07/2011

    Hyndland Secondary School 7 Biology Department

    29. Red blood cells and onion epidermal cells were placed in pure water and

    left for one hour.

    What happens to each of the types cells after one hour in pure water?

    (1)

    30. A single celled organism is found in the water of an estuary where the

    salt concentration of the water is constantly changing. The changes in

    salt concentration are observed to cause volume changes in the organism.

    The volume changes are due to the movement of water in and out of the

    organisms by osmosis.

    What change to the salt concentration of the water causes a decrease in

    the volume of the organism?

    (1)

    31. Tissue from an onion root was placed in water. The diagram below

    represents a cell from the tissue.

    The tissue was then transferred into a very concentrated salt

    solution for one hour.

    a) Copy and complete the diagram below to show the appearance

    of the onion cell contents after this time.

    b) Choose the correct option in the following sentence to make it

    correct: In concentrated salt solution, water passes INTO/OUT OF an onion cell

    from a region of HIGH/LOW water concentration, to a region of

    HIGH/LOW water concentration with the cell membrane acting as a

    SELECTIVELY/FULLY permeable membrane.

    (1)

    (1)

  • Investigating Cells Homework Booklet 20/07/2011

    Hyndland Secondary School 8 Biology Department

    32. Five cylinders of potato tissue were weighed and each was placed

    into a salt solution of a different concentration.

    The cylinders were reweighed after one hour and the results are

    shown in the following table.

    Salt Solution A B C D E

    Intial Mass of potato cylinder (g) 10 10 10 10 10

    Final mass of potato cylinder (g) 12.6 11.2 10.