cell structure

Question 1

“push down hard on the cover slip, but do not push the cover slip sideways”

Explain why she was given this instruction

Answer 1

1. PUSH HARD to squash the tissue

2. DO NOT COVER SLIP SIDEWAYS does not roll up the cells

Question 2

the student concluded that the cell in the image above was in the ANAPHASE stage of mitosis

Answer 2

1. the chromatids move to poles of spindles

2. the centromere of chromatids have been pulled apart

Question 3

a journalist who trat this investigation stated that the drug was effective

is she right with this statement

Answer 3

1. improvement might be evident in some patients
2. no statistical test performed
3. yes
   - draw from the data

Question 4

why is having more mitochondria an advantage for this cell

Answer 4

name the process and state that it needs ATP

mitochondria synthesise ATP

from respiration

Question 5

haemoglobin is a protein

Explain why mature red blood cell cannot make haemoglobin

Answer 5

no nucleus

so no RNA is made

Question 6

plasma membranes that have been isolated from red blood cells are contaminated

explain why

Answer 6

it does not have any membrane bound organelle

Question 7

how do you prepare a sample for

Answer 7

1. add a drop of water to the glass slide
2. obtain a thin section (of plant tissue) and place it on the slide
3. stain with iodine in potassium iodide
4. lower cover slip using mounted needle

Question 8

what do bacteriophage ( a virus) have in common with a bacteria

Answer 8

the bacteriophage gas a capsid and bacterium has a cell surface membrane