BIO LAB EXAM QUESTIONS WITH COMPLETE SOLUTIONS

BIO LAB EXAM QUESTIONS WITH
COMPLETE SOLUTIONS
Biosphere - ANSWER-- worldwide sum of all ecosystems
- include atmosphere and depths of ocean

Simpson's reciprocal index - ANSWER-1/D
- higher value indicate more diverse community

Types of molecules - ANSWER-Polar
- have a partial charge
- compounds with partial charge are hydrophilic "water loving."

Nonpolar
- compounds without a partial charge are nonpolar, hydrophobic "water fearing."
ex. oil

Cholesterol - ANSWER-- regulates fluidity of cell membrane
- strengthens and stiffens membrane

Cell membrane structure - ANSWER-- phospholipid bilayer
- cholesterol
- proteins

Tonicity - ANSWER-- concentration of cytoplasm inside the cell relative to the
concentration of nonpermeable solutes outside the cell
- always seeking balance and equilibrium
- isotonic
- hypotonic
- hypertonic

Passive diffusion - ANSWER-- high to low concertation gradient
- no energy required
- no protein channel required
- small, nonpolar, lipid soluble
ex. oxygen, carbon dioxide, some alcohols

Facilitated diffusion - ANSWER-- large molecules, charged, polar
ex. glucose, ion (Na+ and Ca+), H2O
- require protein transporter
- no energy required
- passive - with concentration gradient

Active Transport - ANSWER-- moves against concentration gradient