Pages in this set

Page 1

Preview of page 1
Biology ­ Unit 1
1. Disease

These include bacteria, viruses and fungi. Whenever one of these manages
to penetrate an organism (for example by the digestive or respiratory
systems in humans), disease can be contracted.

Some pathogens damage the cells of the host, and some secrete harmful


Page 2

Preview of page 2
Test is biuret, positive is purple

Page 3

Preview of page 3

Catalyst lowers activation energy by forming enzyme substrate complex

Induced Fit

Lock and Key (Wrong)

Temperature: causes breaking of bonds, changes tertiary structure, changes active site
Competitive inhibitor: Same/very similar shaped active site, fits into enzyme instead, substrate
unable to form complex
Non-competitive inhibitor: Fits into another part of…

Page 4

Preview of page 4
3. Cells
Plasma membrane: lipid bilayer
+ protein carriers + protein
channels, selectively permeable
for transport

Microvilli: +++ surface area for

Nucleus: DNA + nucleolus +
pores, controls activities

Mitochondria: makes ATP, has

Lysosomes: contain enzymes for
breaking down cell
Ribosomes: made in nucleolus, protein synthesis

Endoplasmic reticulum:…


No comments have yet been made

Similar Biology resources:

See all Biology resources »