- Non-competitive inhibition of an enzyme can be overcome by adding large amount of substrate substrate
- Competitive inhibition is seen, when a substrate competes with an enzyme for binding to an inhibitor protein
- Competitive inhibition is seen, when the substrate and the inhibitor compete for the active site on the enzyme
- Non-competitive inhibitors often bind to the enzyme irreversibly.
Category: Past Papers MCQs
| No. | Topics. | No. | Topics. |
|---|---|---|---|
| 1. | Biology mcqs | 2. | Chemistry mcqs |
| 3. | General Knowledge mcqs | 4. | Pak Studies |
| 5. | Physics mcqs |
- Hind limb of rabbit
- Dorsal fin of a shark
- Wing of a moth
- Flipper of whale
- Fluorescence
- Luminescence
- Intersystem crossing
- d Phosphorescence
- Cilia are hair-like cellular appendages.
- Microtubules of cilia are composed of tubulin.
- Cilia contain an outer ring of nine doublet microtubules surrounding two single microtubules.
- The organized beating of cilia is controlled by fluxes of Ca2+ across the membrane.
- Sporogenous tissue is haploid
- The hard outer layer of pollen is called intine
- Tapetum nourishes the developing pollen
- Microspores are produced by endothecium
- Name of author is written after the species in italics
- Genetic name always starts with a capital letter while a specific name starts with a small letter
- Scientific name should be derived from the Latin language
- Scientific names must be printed in italics and in the handwritten form they must be underlined
- all plants, animals, fungi, and microorganisms exhibit metabolism
- interactions among the molecular components of the organelles result in the properties of cell organelles
- properties of cellular organelles are present in the molecular constituents of the organelles
- cellular organization of the body is the defining feature of life forms
- Brunner's glands are present in submucosa of stomach and secrete pepsinogen
- Goblet cells are present in the mucosa of intestine and secrete mucus
- Oxyntic cells are present in the mucosa of stomach and secrete HCI
- Acini are present in the pancreas and secrete carboxypeptidase
- The genes may be on different chromosomes
- The genes are tightly linked
- The genes show independent assortment
- if the genes are present on the same chromosomes, they undergo more than are crossovers in every meiosis
- Fats and oils are stored source of energy
- They provide more energy than proteins or carbonydrates
- They help m absorbng the vitamins A and D
- Fats are soluble in water
- Photosystems are arrangements of chlorophyll and other pigments packed into thylakoids.
- Many Prokaryotes have only one photosystem.
- Both A and B are correct.
- Only A is correct.
- Most of a cell’s DNA molecule are stored there.
- Complete polypeptide is released from there.
- mRNAs are produced there.
- DNA replication takes place there.
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