Cells

Cell exam question reteach

This is one question on cells that was not answered well in the homework.

Back to basics

• You need to be able to decribe the organelles (organs or parts) or animal and plant cells

• You need to be able to decribe the function (job) of each organelle

• You need to be able to compare the differene between animal and plant cells

• Apply your knowledge to more unusal examples

• TASK: watch the video, draw both types of cells and label each one. Include notes on each organelle and thier function

Multiple Choice

Which set of statements decribes the similiarities between animal and plant cells?

• Cell wall, vacuole, chloroplast, vacuole

• cell membrane, nucleus, cytoplasm, mitochondria

Poll

How confident do you feel about animal and plant cells?

• Green - confident

• Amber- hmm ok

• Red - miss what are you talking about

The cell is more complex than you think but it needs to be. Cells are the building blocks of all life

Why are root hair cells white and not green?

Select your answer on the next slide.

Multiple Choice

Why are root hair cells white and not green?

• They are green you just do not see the green colour as the roots are underground.

• They contain haemoglobin which makes the cells white.

• They do not contain Chloroplasts which contain chlorophyll as there is no light therefore no photosynthese.

How are root cells adapted to thier function?

• First think about what the role of roots in a plant are?

• Then think about how the cells and structure are different.

Open Ended

Explain how the root helps with the uptake of minerals?

Specialised cells

• Stem cells are "blanks"

• Chemicals and genes are involved in triggering the stem cell to "switch" genes on or off to develop into the required cell.

Multiple Choice

1. Where is the genetic material in a prokaryotic cell? [1 mark]

• Cytoplasm

• Mitochondria

• Cell membrane

• Nucleus

Open Ended

The drawing is x350 magnification.

Work out an estimate for the actual length of the cell labelled A.

Show your working. [2 marks]

1. The diagram shows a labelled drawing of onion epidermis cells as seen through a light microscope.

How do you prepare a slide to view onion epidermis cells using a light microscope? [3 marks]

Open Ended

Write down one sub-cellular structure that can only be seen using electron microscopy. [1 mark]

Open Ended

How do you prepare a slide to view onion epidermis cells using a light microscope? [3 marks]

Open Ended

Why can more sub-cellular structures be seen using an electron microscope? [1 mark]

1. Plants need water for photosynthesis.

Water is taken in from the soil through root hair cells.

Look at the diagram of the root hair cell and answer the question on the next slide.

Open Ended

Why are root hair

cells good at taking in water? [1 mark]

Specialised cells - neurones

• Senory, motor and relay neurones for part of the nervous system

Multiple Choice

1. Which of the following is the correct order for a reflex action? [1 mark]

Poll

How confident do you feel about cells?

• Green - I got this

• Amber - no sire

• Red- miss what are your talking about?