Enzymes, enzyme structure, Oxidoreductases, hydrolases, Isomerases.
Organisms utilize enzymes to speed up chemical reactions through their biological catalyzing properties which play a vital body functions in metabolism digestion and energy production. Each enzyme protein demonstrates exceptional selectiveness because it functions only with specific reactions. Students who plan to take the ECAT need a comprehensive understanding of biology enzymes because they serve as the basis for numerous essential body processes.
Structure and Function of Biology Enzymes
Enzymes possess specific three-dimensional shapes with active binding sites that enable substrate molecules to transform inside these areas. The enzymes operate within controlled temperature and pH conditions until denaturation occurs from extreme changes. The effects of co-factors together with inhibitors and substrate concentrations determine the level of enzyme activity.
Classes of Biology Enzymes
- Oxidoreductases: These enzymes facilitate oxidation-reduction reactions, essential in cellular respiration and energy production.
- Hydrolases: Responsible for breaking down complex molecules by adding water, hydrolases are crucial for digestion.
- Isomerases: These enzymes catalyze the rearrangement of molecules within a compound, aiding in metabolic pathways.
Importance of Biology Enzymes in ECAT Preparation
The MCQs on Biology Enzymes evaluate students on their understanding of enzyme specificity combined with substrate binding and enzyme kinetics together with co-enzyme functionality. The comprehension of these fundamental principles helps students develop their biological problem-solving ability while offering them better preparation for competitive testing.
Conclusion
Mastering Biology Enzymes is vital for ECAT entry test success. Their role in metabolism, digestion, and molecular transformations makes them a key topic in biology. By studying their mechanisms, functions, and classifications, students can improve their conceptual clarity and perform better in the exam.
1. The non-protein part of enzyme is known as ?
- Co-factorcorrect
- Prosthetic group
- Co-enzyme
- Coordinated part
2. The binding site helps the enzyme in the recognition and binding of a proper substrate to produce ?
- ES Complex
- enzyme substrate complex
- A % B bothcorrect
- enzyme product complex
3. An enzyme and its substrate react with each other through definite charge bearing sites called ?
- Passive sites
- Charged sites
- Binding sites
- Active sitescorrect
4. The catalytic activity of enzymes is restricted to a small portion of the enzyme known as ?
- Binding site
- Active sitecorrect
- Catalytic site
- Non binding site
5. Without the enzymes the reactions would proceed at a very slow speed making life ?
- Possible
- Difficult
- Troublesome
- Impossiblecorrect
6. If the vibrations due to increase in heat energy become too violent, globular, structure essential for enzyme activity is lost and enzyme is said to be ?
- Denaturedcorrect
- Dead
- Inactive
- Destructured
7. If the non-protein part is loosely attached to the protein part it is known as ?
- Co-enzymecorrect
- Co-factor
- Apoenzyme
- Holoenzyme
8. Like enzymes, co enzymes can be used ?
- None of above
- Again and againcorrect
- Only once
- Only few times
9. Enzymes are composed of hundreds of ?
- Carboxylic acid
- Nucleic
- Nucleotides
- Amino acidscorrect
10. According to Lock and Key Model active site is a ?
- Rigid Structurecorrect
- Globular structure
- Specific structure
- General structure
11. Enzymes are very ______ in their function ?
- Specificcorrect
- Exact
- Precise
- General
12. An activated enzyme consisting of polypeptide chain and a co-factor is known as ?
- Enzyme activation
- Co-enzyme
- Holoenzymecorrect
- Apoenzyme
13. The functional specificity of every enzyme is the consequence of its specific chemistry and ?
- Amino acids
- Physics
- Configurationcorrect
- Catalytic power
14. For enzyme of human body the optimum temperature is ?
- 44° C
- 98° C
- 51° C
- 37° Ccorrect
15. The reactant which is attached to the active site of enzyme is called as a ?
- Food particle
- Substance
- Reactant particle
- Substratecorrect
16. At low concentration of substrate the reaction rate is directly proportional to the ?
- Ph available
- Substrate availablecorrect
- All of these
- Enzyme available
17. All enzyme can work at their maximum rate at a specific temperature called ?
- Optimum temperaturecorrect
- Specified temperature
- Maximum ranged temperature
- Minimum ranged temperature
18. Lock and Key Model was proposed by ?
- Koshland
- Peter Fleming
- Emil Fischercorrect
- Francis
19. Induce fit Model was proposed by ?
- Koch
- Newland
- Koshlandcorrect
- Emil Fischer
20. Enzyme activity requires ?
- Gaseous media
- Aqueous mediacorrect
- None of these
- Semi-solid media
21. Pepsin is a powerful protein digesting enzyme and is produced in inactive form known as ?
- Ptyalin
- Pepsinogencorrect
- Pepsi-gen
- Pepsi
22. Enzymes are the most important group of proteins which are biologically ?
- Energetic
- Dynamic
- Inactive
- Activecorrect
23. The charge and shape of the active site is formed by some amino acids present in the _______ chain of the enzyme ?
- Polynucleotide
- Straight
- Polypeptidecorrect
- Globular
24. An enzyme is a three dimensional ?
- Globular proteincorrect
- Straight protein
- Fibrous protein
- Branched protein
25. By increasing the enzyme molecules, an increase in the number of ______takes place ?
- Binding sites
- Passive sites
- Active sitescorrect
- Catalytic sites