Bimolecules

Question 1

How much of the human body weight is water?

Answer 1

2/3 of the human body is water

Question 2

Polar molecule

Answer 2

• One oxygen atom bonded to 2 H2 atoms

Question 3

3 phases of water

Answer 3

Dependent on temp water can be gas liquid &solid

Question 4

Functions of liquid water

Answer 4

• Transport
• lubricate
• cushion
• excrete wastes

Question 5

Why is water liquid @ roomtemp ?

Answer 5

B/c of the hydrogen bonding @ room temp

Question 6

What is the solvent of the body

Answer 6

Water

Question 7

Universal solvent

Answer 7

Most substances dissolve in it

Question 8

Solutes

Answer 8

Substances that dissolve in water

Question 9

Hydrophilic

Answer 9

Some polar molecules and other charged substances dissolve w/in water

Question 10

Hydrophobic

Answer 10

Non polar molecules do not dissolve in H2O

Question 11

Amphiphatic molecules

Answer 11

Partially dissolve

Question 12

How does water form ions

Answer 12

Water spontaneously dissociates to form ions

Question 13

Hydroxide ion

Answer 13

OH - the remaining group

Question 14

Hydronium ion

Answer 14

Transfers to second water molecule
H30

Question 15

When does water remain neutral

Answer 15

=#s of positive hydrogen ions and negative hydroxyl ions produced water remains neutral

Question 16

Acids

Answer 16

• Proton donor
• increases the concentration of free H POS
  _ more dissociation of H POS w stronger acids ex: Hcl in the stomach
• less dissociation w weaker acids ex: carbonic acid in blood

Question 17

Base

Answer 17

• Proton acceptor
  -Dec the concentration of H plus free in solution
  -more absorption of H plus w stronger bases ex ammonia and bleach
• less absorption w weaker bases ex: bicarbonate in the blood and in the secretions released in the small intestine
• substance B base in water forms b-h

Question 18

What is p H

Answer 18

It is a measure of ‘ H plus

Question 19

What is the ph of water

Answer 19

7

Question 20

What makes a solution neutral

Answer 20

Solutions w/ = amounts of h plus a OH ions

Question 21

How are acids neutralized

Answer 21

-by adding base

Question 22

How are bases neutralized

Answer 22

By adding acid

Question 23

Butters and how they work

Answer 23

Help prevent ph changes if excess acid-or base is added
They accept H plus from excess acid or donate H. to neutralize base

Question 24

Organic molecules

Answer 24

Molecules that have carbon
Components of living organisms

Question 25

Inorganic molecule

Answer 25

All other molecules water salts acids. bases

Question 26

4 class of biomolecules in living systems

Answer 26

-Lipids
- proteins
- carbohydrates
- nucleic acids

Question 27

how does carbons ability to form covalent bonds with other atoms help

Answer 27

Allows the formation of large diverse complicated molecules necessary for life

Question 28

How do carbon atoms bond together

Answer 28

By covalent bonds aka backbone of many large molecules

Question 29

Carbohydrates building blocks and function

Answer 29

Monosaccharides
Energy

Question 30

Lipids building blocks and function

Answer 30

Glycerol and fatty acids
Regulation
Structure
Energy

Question 31

Is co2 organic

Answer 31

No it’s inorganic

Question 32

Protein building blocks and function

Answer 32

-amino acid
- regulation, structure energy contraction Transport protection

Question 33

Lipid building block and function

Answer 33

Glycerol and fatty acids
Regulation structure and support energy

Question 34

Nucleic acids function and building blocks

Answer 34

Nucleotides
Regulation
Heredity
Gene expression

Question 35

Dehydration synthesis

Answer 35

-occurs during the synthesis of biomolecules
- one subunit losses a H
Other