W1 Intro lecture

Question 1

Cells def.

Answer 1

The fundamental unit of all living things on earth. They take nutrients and free energy from their surroundings and make copies of themselves.

Question 2

What is amoeboid movement in WBC

Answer 2

The locomotion i.e. the crawling by protrusion of the cytoplasm of cell by pseudpodia + posterior uropods

Question 3

Taxonomy

Answer 3

Academic discipline of defining groups of biological organisms on the bases of shared characteristics

Question 4

Phylogenetics

Answer 4

Study of evolutionary relationships among groups of organisms

Question 5

Function of cholestrol

Answer 5

Decreases fluidity + increases flexibility of CM, helps separate the PL so that the fatty acid chains can’t come together and crystallise. Reduces permeability of soluble molecules

Question 6

Integral/extrinsic proteins

Answer 6

Move specific molecules across membrane via channels/pores, most have residues w/HP side chains that attract w/acyl in fatty acid of CM PL thus attaching protein to CM

Question 7

Homeostasis

Answer 7

The ability or tendency of an OG/cell to maintain internal equilibrium by adjusting it’s physiological process

Question 8

General formula carbs

Answer 8

(CH2O)n

Question 9

D/L sugar

Answer 9

D = if OH on bottom chiral centre points to the right
L  = if OH on bottom chiral centre points to the left

Question 10

Primary structure

Answer 10

AA residues in straight chain w/covalent peptide bonds forming a peptide

Question 11

Secondary structure

Answer 11

Folded regularly, stabilised by H bonds (forming helices/sheets)

Question 12

Tertiary structure

Answer 12

Folding into 3D structure that has H bonding, hydrophobic/hydrophilic, VW forces

Question 13

Vasodilators

Answer 13

Dilate blood vessels allowing blood to flow more easily