GCSE Biology Unit 2 Flashcards:

Question 1

What Is The Role Of Enzyme Catalyse?

Answer 1

To Increase The Rate Of Specific Reactions In Living Organisms.

Question 2

What Is The Lock And Key Theory?

Answer 2

A Simplified Model That Explains Enzyme Action.

Question 3

Draw And Label The Lock And Key Theory Diagram.

Question 4

What Affects The Activity Of Enzymes?

Answer 4

Changes In Temperature And pH.

Question 5

Enzymes Activity Has An Optimum…

Answer 5

Temperature And pH.

Question 6

Draw And Label A Diagram Of Enzyme Activity Temperature And pH.

Question 7

What Happens When Temperature And pH Have Large Changes In Temperature Or pH?

Answer 7

Enzyme Can Stop Working- The Enzyme Changes Shape, Denatures The Substrate And No Longer Fits The Active Site.

Question 8

What Is The Human Digestive System?

Answer 8

An Organ System In Which Organs Work Together To Digest And Absorb Food.

Question 9

What Leads To Obesity?

Answer 9

. More Energy Consumed In Food And Drink Then Used.
. Very Little Or No Physical Activity Done During The Day.

Question 10

Define Non-Communicable Diseases And Give Examples.

Answer 10

Diseases Which Cannot Be Transferred To Other People Or Organisms.
E.g. . Diabetes.
. Some Cancers.
. Heart Disease.

Question 11

Define Communicable Disease And Give Examples.

Answer 11

Diseases Which Can Be Transferred To Other People Or Organisms.
E.g. . HIV.
. Measles.
. Salmonella.

Question 12

Draw And Label The Human Body.

Question 13

What Are The 3 Food Tests?

Answer 13

. Sugar, (Glucose).
. Starch.
. Biuret.

Question 14

What Is The Benedicts Test Aim And Result?

Answer 14

Is Used To Determine Whether A Substance Contains Reducing Sugars Or Not. If Your Solution Turns From Orange To Brick Red, The Substance Contains Reducing Sugars.

Question 15

What Is The Iodine’s Test Aim And Result?

Answer 15

The Iodine Test Is Used To Determine Whether Or Not There Is Starch Present Within The Leaf. If Your Iodine Solution Turns Dark Bluish/ Black At The End Then There Is Starch Present.

Question 16

What Is The Biuret Reagent’s Test Aim And Result?

Answer 16

The Biuret Reagent Test Tests To See If There Are Any Peptide Bonds. If The Sample Solution Turns Mauve/Purple, Then There Are Peptide Bonds Present.

Question 17

What Are Peptide Bonds?

Answer 17

The Chemical Bond Formed Between When The Carboxyl Group Of One Molecule Reacts With The Amino Group Of The Other.

Question 18

Define And Give An Example Of Cells.

Answer 18

The Basic Building Blocks Of All Living Organisms.
E.g. Muscle Cells.

Question 19

Define And Give An Example Of A Tissue.

Answer 19

A Group Of Cells With A Similar Structure And Function.
E.g. Muscle Tissue.

Question 20

Define And Give An Example Of An Organ?

Answer 20

The Working Together Of Tissues Performing A Specific Function.
E.g. The Heart.

Question 21

Define And Give An Example Of An Organ System.

Answer 21

Organs Working Together To Form Organ Systems, Which Work Together To Form An Organism.
E.g. The Circulatory System.

Question 22

Where Are Proteases Made And What Do They Do?

Answer 22

They Are Made In The Stomach And Pancreas And Break Down Protein Into Amino Acids.

Question 23

Where Are Lipases Made And What Do They Do?

Answer 23

They Are Made In The Pancreas And SI, (Works In The Small Intestine) And Breaks Down Lipids, (Fats) To Glycerol And Fatty Acids.

Question 24

Where Is Bile Made And Stored And What Does It Do?

Answer 24

Bile Is Made In Liver, Stored In The Gallbladder And The Emulsifier Lipids It Contains Increases The Surface Area, The Rate Of Lipid Broken Down By Lipase.

Question 25

Where Is Amylase Made And Stored And What Does It Do?

Answer 25

It’s Made In Salivary Glands, Pancreas And Small Intestine. It Breaks Down Carbohydrates To Simple Sugar.

Question 26

What Are The 4 Different Types Of Teeth And Their Functions?

Answer 26

. Molars- Crushing And Chewing Plant Foods Into Easily Swallowable And Digestible Pieces.
. Canines- Help You Tear Into Foods.
. Incisors- To Cut The Food.
. Premolars- Help You Tear, Crush And Grind Food Into Smaller pieces. (Has The Features Of Both Canines And Molars.)

Question 27

Why Is Amylase Needed For Digestion?

Answer 27

Amylase is an enzyme, or special protein, that helps you digest carbohydrates. Most of the amylase in your body is made by your pancreas and salivary glands.

Question 28

Define Amylase.

Answer 28

an enzyme that changes complex sugars (starches) into simple sugars during digestion.