B1.1 Cells

Question 1

Describe how the contents of the nucleus allow it to carry out its function

Answer 1

It contains genetic material that controls the cells activities

Question 2

Name one structure within a prokaryotic cell that contains genetic material

Answer 2

Plasmid

Question 3

How has electron microscopy increased our understanding of how plant cells work

Answer 3

Electron microscopes lets us see the details or sub cellular structures , like the internal structure of the mitochondria.

Question 4

Outline the steps the student should take to get a bigger I age of the cells using a light microscope.

Answer 4

Swap to higher objective lens

Refocus the image using the adjustment knobs

Question 5

What is the difference between Transmission electron microscope (TEM) and scanning electron microscope (SEM)

Answer 5

TEM produce magnified images . A beam of electrons is passed through a sample . The beam is focused to produce an image.

SEM produces a 3D image or a surface. A beam of electrons is sent across the surface of a specimen. The reflected electrons collected produce an image