Enzyme  q and a
Upcoming SlideShare
Loading in...5
×
 

Enzyme q and a

on

  • 2,696 views

Dr.Ehab Aboueladab

Dr.Ehab Aboueladab

Statistics

Views

Total Views
2,696
Views on SlideShare
2,696
Embed Views
0

Actions

Likes
4
Downloads
190
Comments
2

0 Embeds 0

No embeds

Accessibility

Categories

Upload Details

Uploaded via as Adobe PDF

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel
  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

Enzyme  q and a Enzyme q and a Document Transcript

  • 1: What is a cofactor?(A) Inorganic ions(B) Organic molecules(C) Both a and b(D) None of the above2: Mg+2 is an inorganic activator for the enzyme(A) Phosophatase(B) Carbonic anhydrase(C) Enterokinase(D) Amylase3: Zn+2 is an inorganic activator for enzyme.(A) Carbonic anhydrase(B) Phosophatase(C) Chymotrypsin(D) Maltase4: Which antibiotic blocks the active site of an enzyme that many bacteria usedto make cell-walls.(A) Amphotericin(B) Gentamicin(C) Penicillin(D) Cephalosporin Dr. Ehab Aboueladab, Associate Prof.Dr. Of Biochemistry and Nutrition, email:ehab10f@gmail.com
  • 5: DDT and Parathion are inhibitors of key enzymes in(A) Nervous system(B) Respiratory system(C) Digestive system(D) Circulatory system6: At high temperature the rate of enzyme action decreases because the increasedheat(A) Changes the pH of the system(B) Alters the active site of the enzyme(C) Neutralize acids and bases in the system(D) Increases the concentration of enzymes7: Which of the following enzymes would digest a fat?(A) sucrase(B) protease(C) Ligase(D) lipase8: In the Lock and Key model of enzyme action, the part of the enzyme thatrecognizes the substrate is known as the(A) Enzyme-substrate complex(B) Product(C) Enzyme-product complex(D) Active site Dr. Ehab Aboueladab, Associate Prof.Dr. Of Biochemistry and Nutrition, email:ehab10f@gmail.com
  • 9: Which model of enzyme action is represented in this diagram.(A) Fluid mosaic model(B) Induce fit model(C) Lock and key model(D) Reflective index model10: A certain enzyme will hydrolyze egg white but not starch. Which statementbest explains this observation?(A) Starch molecules are too large to be hydrolyzed(B) Enzyme molecules are specific in their actions(C) Egg white acts as a coenzyme for hydrolysis(D) Starch is composed of amino acids.Answer key1.C, 2.A, 3.A, 4.C, 5.A, 6.B, 7.D, 8.D, 9.C, 10.B Dr. Ehab Aboueladab, Associate Prof.Dr. Of Biochemistry and Nutrition, email:ehab10f@gmail.com View slide
  • 1. The simplest amino acid isa)Glycine b)Lysine c)Tyrosine d)Aspartic acid2. A source of maximum energy isa)Carbohydrate b)Fat c)Protein d)Vitamins3. Besides nucleus, DNA is also present ina)Mitochondria b)Lysosomes c)Golgi apparatus d)Ribosomes4. Purines of RNA area)Guanine and adenine b)Uracil and thymine c)Adenine and cytosine d)Uracil andguanine5. Structure of DNA was given bya)Kornberg b)Nirenberg c)Watson and Crick d)Holley and Nirenberg6. Cellulose isa)Hexosan polysaccharide b)Pentosanpolysaccharide c)Heptopolysaccharide d)Heteropolysaccharide7. Proteins were named bya)Berzelius b)Sanger c)Fleming d)Dujardin8. Purine bases of DNA area) A and G b)A and C c)C and T d)A and U9. Bond present between two nucleotides of a polynucleotide isa)Covalent bond b)Hydrogen bond c)Phosphodiester bond d)high energy phosphatebond10. The protein part of enzyme isa)Prosthetic group b)Apoenzyme c)Holoenzyme d)ZymogenAnswer1a,2b,3a,4a,5c,6a,7a,8a,9c,10b1: It is estimated that a person of average size contains 16 Kg of fat which is equivalentto(A) 244000 K.Cal of energy(B) 164000 K.Cal of energy(C) 144000 K.Cal of energy(D) 188000 K.Cal of energy2: All living things use the same ___ amino acids.(A) 4(B) 20(C) 100(D) 64 Dr. Ehab Aboueladab, Associate Prof.Dr. Of Biochemistry and Nutrition, email:ehab10f@gmail.com View slide
  • 3: One molecule of glucose and one molecule of galactose form(A) Maltose(B) Sucrose(C) Lactose(D) Isomaltose4: A disaccharide that gives two molecules of glucose on hydrolysis is(A) Sucrose(B) Lactose(C) Maltose(D) None of these5: Lactose is present in(A) Sugar cane(B) Fruits(C) Milk(D) Egg6: Membrane carbohydrates when linked to lipids are called(A) Sphingolipids(B) Glycolipids(C) Phospholipids(D) Sterols7: Triglycerides that are solid at room temperature.(A) Fats(B) Oils(C) Linoleic acid(D) None of these8: Triglycerides that are liquid at room temperature.(A) Fats(B) Oils(C) Stearin(D) All of these9: A chemical group composed of a central phosphorous bonded to four oxygen.(A) Carbonyl group(B) Sulfhydryl group(C) Carboxylic(D) Phosphate group Dr. Ehab Aboueladab, Associate Prof.Dr. Of Biochemistry and Nutrition, email:ehab10f@gmail.com