Test 1

Question 1

properties of life:

Answer 1

order, 
regulation, 
growth & development, 
energy process,
response 2 environment,
reproduction
evolution

Question 2

what do ecosystems depend on

Answer 2

recycling of chem. nutrients & flow of energy

Question 3

basic unit of struct. for living things

Answer 3

cells

Question 4

what creatures make up majority of species

Answer 4

eukarya

Question 5

what ties diversity & the unity of life

Answer 5

evolution

Question 6

difference from discovery science and hypnothesis-driven science

Answer 6

discovery science is verifiable data, hypothesis= test observations

Question 7

cause for antibiotic resistance

Answer 7

the whole virus isnt killed, can instead be used for food to multiply and destroy other molecules

Question 8

most abundent elements in living things

Answer 8

oxygen
carbon
hydrogen
nitrogen

Question 9

how do you determine the number of neutrons in an atom

Answer 9

subtract protons from the mass

Question 10

how are adjacent water molecules held together:

Answer 10

through cohesion (molecules of the same kind to stick together)

Question 11

parts of a chemical reaction

Answer 11

reactant, energy, products

Question 12

describe the pH scale, how do pH4 & 6 relate to eachother in H+

Answer 12

pH scale: measures H+
0-6 acidic 7 neutral 8-14 basic
both 4 and 6 have more H+ to give

Question 13

why are scientists so interested in mars

Answer 13

water is basic necessity to life, water was once abundent on mars,, wonder if life did or still does exist there

Question 14

why does bonding depend on the number of electrons in an atom

Answer 14

electrons is what make up shells, more shells more energy, # of electrons determines behavior of the element, and how much energy it has and how many bonds can be made

Question 15

what is a hydrocarbon

Answer 15

simplest organic compound. only hydrogen and carbon

Question 16

the major isomers of mono and disaccharides

Answer 16

isomers= same molecular formula but different structure
mono= simple sugars cant be broken down smaller
> glucose, fructose
dis= double sugar, two mono’s through dehydration process.
>lactose and maltose

Question 17

what do cellulose and glycogen have in common

Answer 17

both polysaccharides storing sugar in animal fat or in plant cell walls

Question 18

4 levels of organization of a protein molecule

Answer 18

primary, secondary, tertiary, quaternary,
or
structural, storage, contractile, and transport

Question 19

saturated vs. unsaturated fat

Answer 19

saturated is a straight line, with the max # of H atoms at double bond
unsaturated is crooked line, w/ less than max H at double bond

Question 20

what does enzyme function depend on

Answer 20

the reduction of active energy to break the bonds and form new bonds

Question 21

what are the 4 bases found in DNA molecules, and how does DNA differ from RNA

Answer 21

4 nitrogenous bases: adenine, guanine, cytosine, and thymine

DNA and RNA differ because RNA has sugar and uracil as well as being single stranded

Question 22

what is meant by complementary bases? give examples

Answer 22

?

Question 23

how do hydrophillic and hydrophobic relate to the phospholipid molecule

Answer 23

a phospholipid molecules has both, a hydrophilic (water loving) head and a hydrophobic (water fearing) tail

Question 24

what is the struct. of the nuclear envelope ( and most other membranes )

Answer 24

there are pores in the envelope 2 allow certain materials 2 pass through but not others

Question 25

what are the major organelles in the cell and what is the function and location of each

Answer 25

plasma membrane: cell barrier
Cytosol: thick, jelly-like fluid in which cellular components are suspended
Chromosomes: all cells have one or more, carrying genes of DNA
ribosomes: build proteins as instructed by genes
>eukaryotic: hace organelles, (little organs), nucleus: house DNA,
prokaryotic: nucleoid: nucleus like where DNA coiled

Question 26

what is the function of ATP in all energy considerations

Answer 26

energy shuttle; store energy from the break down of food and use it for later or when needed

Question 27

what do microtubules do

Answer 27

• straight hollow tubes composed of proteins

|&raquo_space;form basis and structure of movement 4 cilia and flagella

Question 28

laws of conservation of energy and entropy

Answer 28

energy can’t be created nor destroyed only converted

entropy is the measure of randomness and disorder

Question 29

know how to tell in which direction would be the net flow of water with different concentrations

Answer 29

salt dissolves slower than water

Question 30

what are the differences between a plant cell and animal cell

Answer 30

plants have chloroplast (photosynthesis)

animals have lyosome (for digestion)