B1 Cells

Question 1

state two ways in which the structure of a yeast cell differs from structure of bacterial cell

Answer 1

• yeast cell has a nucleus

- yeast cell doesn’t have flagellum

Question 2

suggest why yeast cells cannot produce glucose

Answer 2

• they don’t have chloroplast

Question 3

function of white blood cell

Answer 3

involved in defence against disease - part of immune system

• produces antibodies

Question 4

Person B us a low number of red blood cells compared to a healthy person

suggest an effect this may have

Answer 4

• tired and lack of energy

Question 5

osmosis potato graph cube

name one variable needed to be controlled during experiment

Answer 5

• type of potato

Question 6

give a reason why potato cube must be dried

Answer 6

• to get accurate reading of mass

Question 7

explain the conclusion which can be made about point q on figure 6

Answer 7

• no change in mass at 0.3
• this is the isotonic salt conc of potato
• because there is no net movement of water/no salt concentration gradient

Question 8

which of the following is a correct description of a process involving transport of molecules

Answer 8

B - AT used to obtain molecules in low concentration environment

Question 9

give one way the student could obtain more data to increase accuracy of point q

Answer 9

• repeat the test using intermediate concentrations between 0.2 and 0.4

Question 10

calculate length of flagellum in picometres

Answer 10

68/8000
= 0.0085

8.5picometres