Chapter 10- The Variety Of Life Flashcards Preview

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Flashcards in Chapter 10- The Variety Of Life Deck (15):
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Haemoglobin
Primary structure

Four polypeptide chains

1

Haemoglobin
Secondary structure

Each polypeptide chain is coiled into a helix

2

Haemoglobin
Tertiary structure

Each polypeptide chain is folded into a precise shape - an important factor to carry oxygen

3

Haemoglobin
Quaternary structure

All four polypeptide chains are linked together

Each polypeptide chains is associated with a heme group

4

The role of Haemoglobin

Readily associate with oxygen at a gas exchange surface

Readily disassociate with oxygen at tissues requiring it

5

Why have different haemoglobin's?

High affinity, oxygen will bind more readily to it

Low affinity, oxygen will be released more readily from it

6

Starch

Polysaccharide found in parts of a plant

Made up of chains of alpha glucose

The chain is wound into coils making the molecule very compact

7

Glycogen

Very similar to starch but is found in animal

Made up of smaller chains

8

Cellulose

Chain of beta glucose

Each monosaccharide is rotated 180 degrees when compared to its neighbour

Molecules are grouped together to from microfibrils

Major component in cell walls, provided rigidity to the cell and prevents the cell from bursting
Allowing bonds to form across the chains (similar to the structure of graphite)

9

Leaf palisade cell

Long, thin
Numerous chloroplasts
Large vacuole

10

Chloroplasts

Chloroplasts vary in shape and size but are disc shaped

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The chloroplasts envelope

Double plasma membrane that surrounds the organelle, highly selective on what can enter and leave the organelle

12

Chloroplasts

THE GRANA

Stacks of up to 100 disk like structures called thylakoids

13

Chloroplast

THE STROMA

Fluid filled matrix, where the second part of photosynthesis takes place

14

Cell wall

Consist of a number of polysaccharide's
Thin layer called the middle lamella

Provide mechanical strength
Allow water to pass along it