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Flashcards in bio ch 7 Deck (59)
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1

what organic chemistry studies

study of carbon containing compounds

2

significance of homeostasis with regards to enzymes

Cells depend on enzymes to speed up the many chemical reactions that keep the cell alive--enzymes work best at particular temperatures and homeostasis maintains a constant body temperature.

3

Organelles

structures within a cell that have special functions (little organs)

4

Cytoplasm

portion of cell outside the nucleus Cyto = cell

5

three parts of the cell theory

All living things are made of cells
Cells are the basic units of structure and function in living things (smallest units of life)
New cells are made from existing cells

6

how we find the objective when viewing a sample under a microscope

To get the total magnification take the power of the objective (4X, 10X, 40x) and multiply by the power of the eyepiece,

7

prokaryotes

Cells that do not have a nucleus (bacteria, archairia)

8

eukaryotes

cells that have a nucleus(protists, fungi, plants, animals)

9

what are diffusion and osmosis forms of

passive transport

10

exocytosis

taking material out of cell

11

endocytosis

taking materials into the cell

12

multicellular life

Multicellular organisms specialize their cells for particular task & communicate with each other, ususally with hormones to mantain homeostasis

13

single celled organisms

Single celled creatures grow, respond to environment, transform energy & reproduce.

14

how active transport differs from diffusion or osmosis

Active transport requires chemical energy because it moves biochemicals from areas of lower concentration to areas of higher concentration. Passive trasport doesn’t require energy because it moves biochemicals from areas of high concentration to areas of low concentration.

15

cells impacted by isotonic solutions

cell is unchanged

16

cells impacted by hypotonic

cell swells as water enters to dilute the [high] outside the cell

17

cells impacted by hypertonic

cell shrinks as water leaves the cell to dilute [high] outside the cell

18

osmosis

Osmosis is the diffusion of water through a selectively permeable membrane

19

what it's called when diffusion stop

It’s called equilibrium when it stops:

20

when does diffusion stop

Diffusion stops when molecules are even throughout space

21

what direction diffusion travels

all over

22

what establishes diffusion

particles

23

Scientist who produced ‘Photo 51’, an X-ray diffraction pattern of DNA

rosalind franklin

24

Brilliant American scientist whose progress on DNA’s structure put great pressure on the British teams to find a solution

linus pauling

25

Frustrated and disgruntled, this scientist showed Photo 51 to other scientists without the consent of the photo’s owner.

maurice wilkins

26

An Austro-Hungarian biochemist who found that certain nitrogenous bases always existed in specific proportions.

erwin chargaff

27

Passionate American scientist who ‘put the pieces together,’ developing a successful model of DNA

james watson

28

British scientist who had calculated the predicted X-ray diffraction pattern of a double helix.

francis crick

29

theory

a well tested explanation supported by verified hypothesis and broad explanation

30

inference

a logical interpretation of an observation