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Flashcards in Introduction to biology Deck (26):
1

order, harnesses and utilizes energy, reproduces, responds to stimuli, exhibits homeostasis, grows and develops, and adapts and evolves are 7 traits called what?

The attributes of life

2

water makes up what percentage of our bodies as mammals?

60-90%

3

water is a natural __________ and is important for ________ bonding.

solvent, hydrogen

4

Solute is

a compund dissolved by fluid (solvent)

5

Together, solute and solvent make a _________

solution

6

when water is the solvent, it is called an ____

aqueous solution

7

covalent bonds are bonds in which electrons of two atoms are _________-

shared

8

because water molecules are ________, note that by the polar nature of a solute greatly influences its _________ (dissolvability) in water.

polar, solubility

9

if the solute has strong chemical charges (ex. highly polar) then the solute is _________ __________.

easily dissolved

10

polar solute molecules that dissolve easily in water are called ____________.

hydrophillic

11

solute molecules which are _________ are hardly soluble in water

non-polar

12

non-polar solute molecules which don't or barely dissolve in water are called ________.

hydrophobic

13

solute molecules which possess both non-polar and polar regions are called ____________.

amphipathic

14

amphipathic molecules can form chemical spheres called ________, with their polar ends found at the sphere's surface.

micelles

15

__________ molecules nearby may dissolve in the central, non-polar regions of micelles

hydrophobic

16

An example of an amphipathic molecule is a ________

phospholipid

17

________ bonds are only 1/20th as strong as covalent bonds

hydrogen

18

What is responsible for the formation of water into raindrops, and for the surface tension on a bond?

Cohesion

19

What is the ability of water molecules to adhere or cling to a substrate surface as a film, by forming hydrogen bonds?

Adhesion

20

Chemical reactions involving aqueous solutions can occur in both the _________ and __________ fluids.

intercellular, extracellular

21

The chemical breakdown of a compound due to a reaction with water is ___________

hydrolysis

22

A reaction where water is removed when a new covalent bond forms between two formerly seperate compounds, to synthesize a larger compound is ________

dehydration synthesis

23

The opposite of hydrolysis is ________-

dehydration synthesis

24

What is an example of dehydration synthesis?

A polysaccharide

25

A new covalent bond between glucos molecules, as a result of dehydration synthesis is called ________

a glycosidic bond

26

What is the size range of typical cells?

250nm to 100nm