PCQ 2-2

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Osmosis means the movement of ____ down the concentration gradient of _____

Water, water

Unsaturated fatty acid

Double bond

Diffusion moves ____ the concentration gradient. Choose the correct one.

Down

Carbonyl

-CO

Carboxyl

-COOH

Phosphate

-H2PO4

Amino

-NH2

Hydroxyl

-OH

Sulfhydryl

-SH

15g of a substance (MW = 60g) are dissolved in the 200 mL solution. The molarity (mole/liter) concentration is ____ M

1.25M STEPS: 1) 15g/60g = 0.25g 2) 200mL = .2L 3. 0.25g/.2L = 1.25M

40 grams of a substance (MW = 60g) are dissolved in the 200 mL solution. What is the % concentration?

20% STEPS: 1) 40/200 = 0.2 2) 0.2*100 = 20

Which forms correct double bond between nucleic acids?

A-T

Peptide bond is made of

Carboxyl and amino groups

Unsaturated fatty acid

Contains at least one double bond

Saturated fatty acid

Contains only single bonds

Double-stranded structure

DNA

Genetic material

DNA

Monosaccharide

Glucose, galactose, fructose

Polysaccharide

Glycogen, starch

Secondary structure

Helix, pleated or random coil forms

Steroid

Hydrophobic molecules that stabilize cell membrane

Nucleic acid

Information containing polymers; DNA, RNA (chemical bonds)

Which one is hydrophobic?

Lipid

Wax

Long chain of fatty acids

Phospholipid

Make up cell membrane

Isotonic solution

Normal RBC

Protein is made of

Peptide bond

Adenine

Purine

Guanine

Purine

Cytosine

Pyrimidine

Thymine

Pyrimidine

Uracil

Pyrimidine

Hypertonic solution

RBC is shrieked and crenated

Hypotonic solution

RBC is swollen and hemolysed

Carry gene information from nucleus to cytoplasm

RNA

Single-stranded structure

RNA

Primary structure

Sequence in amino acids

Disaccharide

Sucrose, maltose, lactose

Nucleotides are composed of ____

Sugar, phosphate, base

Tertiary structure

Three-dimensional structure by folding itself


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