Grade 11 Unit 3

Question 1

…….is a body set up to produce a systematic way of naming enzymes

Answer 1

Enzyme Commission

Question 2

alternative name for ……. is gastric protease

Answer 2

pepsin

Question 3

polymerisation is ……

Answer 3

joining similar units together

Question 4

Which enzyme catalyzes removal of hydrogen ions from succinate (during respiration)

Answer 4

Succinate dehydrogenase

Question 5

Which enzymes catalyze joining of nucleotides to form DNA

Answer 5

DNA polymerase

Question 6

These are almost certainly the first uses of ‘enzyme technology’

Answer 6

bread and beer

Question 7

Textile
……. to remove hair and ……. to degrease animal hides and ……… to ‘bio-polish’ cotton fabrics and ‘bio-stone’ denim( gives the ‘stone-washed’ effect much more easily )

Answer 7

Proteases, lipases, cellulase

Question 8

Pulp n paper
……… used in starch conversion(reduces the quantity of starch in the paper and improves quality) and use of ……… enzymes in prebleaching the pulp( produces a whiter paper) and use of ………. in control of ‘stickies’ ( glues introduced during paper recycling, stickies would otherwise clog the machinery and reduce the quality of the paper)

Answer 8

Amylases, xylanase, esterases

Question 9

Food processing
……… to process fruit juice(clarifies fruit juice) and ……… to produce liquid-centre chocolates(Sucrose paste in the chocolate is made liquid by injection of the enzyme)

Answer 9

Pectinase, Inverase

Question 10

Medicine
………… in clinistix strips, tests for glucose( allows easy diagnosis of diabetes by testing urine) and ……… enzymes( testing for high levels of these in the blood confirms liver damage) and ………. to treat cystic fibrosis( reduces viscosity (stickiness) of mucus)

Answer 10

Glucose oxidase, liver, pulmozyme

Question 11

Pharmaceutical
……… to dissolve clots of heart-attack patients(restores blood supply to area of heart muscle) and production of ………(an important anti-AIDS drug) is controlled by enzymes

Answer 11

Streptokinase, abacavir sulphate

Question 12

Dairy
………. to produce cheese(supplies of natural rennet from calves livers are limited) and ……… to produce lactose-free milk(lactose-intolerant people suffer fewer cramps)

Answer 12

Biochymosin, Lactase

Question 13

……….. inhibitors are particularly important in regulating metabolic pathways in cells.

Answer 13

Non-competitive

Question 14

The main part of an enzyme that consists of two molecules

Answer 14

Apoenzyme

Question 15

T/F
Activity of enzymes require a narrow range of pH

Answer 15

T

Question 16

……. is a production when the production of some enzymes that are harmful at high concentration will be controlled

Answer 16

End product inhibition

Question 17

….. is a protein with enzymatic activity

Answer 17

Apoenzyme

Question 18

In which model does bonding of substrate changes the active site of enzyme to accommodate the substrate

Answer 18

Induced fit. Since substrate isn’t complementary to active site, it changed active site to accommodate the substrate

Question 19

In negative feedback mechanism, the product attaches to ……..

Answer 19

On the allosteric site

Question 20

…… is alteration of the structural properties of macromolecules such as proteins

Answer 20

Denaturation