GCSE Biology Unit 2 Flashcards:
What Is The Role Of Enzyme Catalyse?
To Increase The Rate Of Specific Reactions In Living Organisms.
What Is The Lock And Key Theory?
A Simplified Model That Explains Enzyme Action.
Draw And Label The Lock And Key Theory Diagram.
What Affects The Activity Of Enzymes?
Changes In Temperature And pH.
Enzymes Activity Has An Optimum…
Temperature And pH.
Draw And Label A Diagram Of Enzyme Activity Temperature And pH.
What Happens When Temperature And pH Have Large Changes In Temperature Or pH?
Enzyme Can Stop Working- The Enzyme Changes Shape, Denatures The Substrate And No Longer Fits The Active Site.
What Is The Human Digestive System?
An Organ System In Which Organs Work Together To Digest And Absorb Food.
What Leads To Obesity?
. More Energy Consumed In Food And Drink Then Used.
. Very Little Or No Physical Activity Done During The Day.
Define Non-Communicable Diseases And Give Examples.
Diseases Which Cannot Be Transferred To Other People Or Organisms.
E.g. . Diabetes.
. Some Cancers.
. Heart Disease.
Define Communicable Disease And Give Examples.
Diseases Which Can Be Transferred To Other People Or Organisms.
E.g. . HIV.
. Measles.
. Salmonella.
Draw And Label The Human Body.
What Are The 3 Food Tests?
. Sugar, (Glucose).
. Starch.
. Biuret.
What Is The Benedicts Test Aim And Result?
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.
What Is The Iodine’s Test Aim And Result?
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.
What Is The Biuret Reagent’s Test Aim And Result?
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.
What Are Peptide Bonds?
The Chemical Bond Formed Between When The Carboxyl Group Of One Molecule Reacts With The Amino Group Of The Other.
Define And Give An Example Of Cells.
The Basic Building Blocks Of All Living Organisms.
E.g. Muscle Cells.
Define And Give An Example Of A Tissue.
A Group Of Cells With A Similar Structure And Function.
E.g. Muscle Tissue.
Define And Give An Example Of An Organ?
The Working Together Of Tissues Performing A Specific Function.
E.g. The Heart.
Define And Give An Example Of An Organ System.
Organs Working Together To Form Organ Systems, Which Work Together To Form An Organism.
E.g. The Circulatory System.
Where Are Proteases Made And What Do They Do?
They Are Made In The Stomach And Pancreas And Break Down Protein Into Amino Acids.
Where Are Lipases Made And What Do They Do?
They Are Made In The Pancreas And SI, (Works In The Small Intestine) And Breaks Down Lipids, (Fats) To Glycerol And Fatty Acids.
Where Is Bile Made And Stored And What Does It Do?
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.
Where Is Amylase Made And Stored And What Does It Do?
It’s Made In Salivary Glands, Pancreas And Small Intestine. It Breaks Down Carbohydrates To Simple Sugar.
What Are The 4 Different Types Of Teeth And Their Functions?
. 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.)
Why Is Amylase Needed For Digestion?
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.
Define Amylase.
an enzyme that changes complex sugars (starches) into simple sugars during digestion.
