PCQ 2-2
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
