Introductory lecture

Question 1

Leeuwenhoek

Answer 1

examined pondwater teeming with ‘animalcules’, also observed bacteria

Question 2

schweiden and schwann

Answer 2

all organisms composed 1 or more cells
cell is the structural unit of life
but thought cells could arise from non-cellular materials

Question 3

virchow

Answer 3

cells can arise from division of pre-existing cell

Question 4

where do cellular processes take place in bacteria

Answer 4

in the cytoplasm

Question 5

where can you find dna in eukaryotes

Answer 5

nucleus, mitochondria, chloroplast

Question 6

function of cells

Answer 6

possess a genetic program
capable of producing more of themselves
acquire and utilise energy
carry out chemical reactions
engage in lots of mechanical activities
respond to stimuli- make changes dependent on conditions

Question 7

what happens with cancer

Answer 7

changes in cell signalling pathways

cells divide uncontrollably

Question 8

1mm in m, um, nm

Answer 8

10^3 m
10^6 um
10^9 nm