9) Chemical Reactions in Organisms

Question 1

Organisms carry out a whole range of chemical reactions in order to maintain their survival.
Organisms need to carry out m__________ r____________ to survive.

Answer 1

metabolic reactions

Question 2

Metabolism refers to a___ t___ r______ of the body.

Answer 2

all the reactions

Question 3

These reactions need to happen q_________ so that organisms can r________ to changes in their e_______________.

Answer 3

quickly
react
environment

Question 4

Reactions can be sped up by i___________ t____________.

Answer 4

increased temperatures

Question 5

If you increase the temperature where a reaction happens and the temperature of the molecules involved, you do get a h_________ r__________ of r___________.

Answer 5

a higher rate of reaction

Question 6

Why doesn’t the body just live at a higher temperature?

Answer 6

High temperatures can damage cells.

Question 7

High temperatures can damage cells in two ways.

1. They can m______ l_________.
2. High temperatures can d_________ p_________.

Answer 7

1. melt lipids

2. denature proteins

Question 8

If proteins become denatured it means that they l_______ their s________.
Which means that they can’t f_________ properly.

Answer 8

lose
shape
function

Question 9

Another way to speed up a reaction is to use a c____________.

Answer 9

catalyst

Question 10

A catalyst is a c_________ that speeds up the r__________ of r___________ and remains u_________ and r__________ at the end of the reaction.

Answer 10

chemical
rate of reaction
unchanged
reusable

Question 11

B__________ c____________ for metabolic reactions are called e__________.

Answer 11

biological catalysts

enzymes