test 2 ch 4,5,6

Question 1

what year were cells began to study?

Answer 1

1830s

Question 2

what kind of concept is biology?

Answer 2

unifying concept

Question 3

which 2 biologists did biology originate from?

Answer 3

1.matthis schleiden (1804-1881)
2.theordor schwann (1810-1882)

Question 4

cell theory (3)

Answer 4

1.all organisms are composed of cells
2.all cells come only from pre existing cells
3. cells are the smallest structural and functional unit of organisms

Question 5

size range for cells

Answer 5

from 1 millimeter to 1 micrometer

Question 6

in order to exchange material, what do cells need

Answer 6

large surface area of plasma membrane

Question 7

what is surface-area-to-volume

Answer 7

requires that cells be small

Question 8

Structure of DNA

Answer 8

Double stranded helix with complementary base pairs

Question 9

What are Histones?

Answer 9

DNA is wrapped around small globular proteins called histones to make compact

Question 10

Structure of ATP

Answer 10

Adenosine Triphoshate, energy is relased when ATP s dyfolysed into ADP and P. The 3rd phosphate bond is easily broken to form ADP and P

Question 11

Role of Endoplasmic Reticulm, Ribosomes

Answer 11

Smooth ER-Lipid synthese, rough ER contains ibsomes and is involved wwith protein sy