bio 2-5

Question 1

Polar Covalent bond

Answer 1

Shared electrons are pulled closer to the more electromagnetic atom, making one atom slightly negative and one slightly positive

Question 2

What do lipids do?

Answer 2

Phospholipid bilayer of a membrane is held together by the concept of the hydrophilic head and hydrophobic tail

Question 3

Nucleic ACIDS

Answer 3

DNA RNA
Phosphate groups, sugars, nitrogenous base

Question 4

monomers for proteins

Answer 4

Amino acids

Question 5

Amino group (structural function)

Answer 5

-NH2

Question 6

IONIC BOND

Answer 6

a chemical bond resulting from the attraction between oppositely charged ions

Question 7

WHAT DO PROTEINS DO?

Answer 7

Link of amino acids; formed by dehydration rxn between the amino group and the carboxyl group of another amino acid

Question 8

Monomers for lipids

Answer 8

Fatty acids, glycerol

Question 9

Enantiomers

Answer 9

Mirror images of each other that differ in shape due to the prescence of an asymetric carbon

Question 10

Non polar covalent bond

Answer 10

a type of covalent bond where electrons are shared equally between 2 atoms of similar electronegativity
if they didn’t work what would we breathe?

Question 11

Phosphate group (structual function)

Answer 11

OPO3^2-

Question 12

SULFHYDRYL GROUP (STRUCTUAL FUNCTION)

Answer 12

-SH

Question 13

GEOMETRIC ISOMERS

Answer 13

have the same molecular formula and covalent bonds between atoms but differ in spatial arrangements of their atoms due to the inflexibility of double bonds

Question 14

ALDEHYDE GROUPS

Answer 14

Carbon groups at the end of a carbon skeleton

Question 15

Structural isomers

Answer 15

one of two or more compounds with the same molecular formula but differ in the covalent arrangements of their atoms (may also differ in the location of double bonds)

Question 16

Solvent of life

Answer 16

The most versatile
Water is the universal solvent because it is the most versatile solvent known; it can dissolve many other substances because of the formation of hydrogen shells and it’s the ability to form hydrogen bonds

Question 17

Ice floats

Answer 17

Hydrogen bonds connect one water molecule to four other water molecules, making a uniform network and spreading the H2O molecules out in a way, so ice floats in water

Question 18

Carboxyl group (structural function)

Answer 18

COOH

Question 19

Carbonyl group (structural function)

Answer 19

carbon is double bonded by oxygen c–o

Question 20

electron

Answer 20

• charge

Question 21

dna

Answer 21

double helix (thymine)

Question 22

RNA

Answer 22

Single strand ( uracil)

Question 23

hydroxyl group (structural function)

Answer 23

-OH

Question 24

High specific heat

Answer 24

Caused by H-bonding among water molecules; when heat is absorbed by H2O, hydrogen bonds in the water absorb the heat to break their bonds (take a high temperature to break all the H-bonds), so the water molecules can move freely

Question 25

Polymers of carbohydrates

Answer 25

Dissacharides (sucrose, maltos, lactose)

Polysaccarides (glycogen, cellulose, starch)

Question 26

Protons

Answer 26

Positively charged

Question 27

Nuetrons

Answer 27

No charge

Question 28

Monomers of carbohydrates

Answer 28

Monosaccharides (glucose, fructose, galactose)

Question 29

Methyl group (structural function)

Answer 29

CH3

Question 30

Ketone groups

Answer 30

Carbonyl groups within the skeleton

Question 31

Cohesion

Answer 31

Linkage together of like molecules often by H bonds