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WorksheetsBIOSPLENDID 2.2 (SET 1 ) SEM 2
Total questions: 16
Worksheet time: 8mins
1. A group of species is separated into two populations by a mountain range. Mating between individuals of the two populations produces sterile progenies. Which of the following explains this phenomenon?
Speciation does not take place.
Genetic drift does not take place.
Allopatric speciation takes place.
Sympatric speciation takes place
2. What is the mechanism that can cause sympatric speciation?
Reproductive isolation
Polyploidy
Extrinsic isolation
Geographical isolation
3. Natural selection involves environmental factors as selecting agent. Which of the following is NOT a type of natural selection?
Stabilising selection
Disruptive selection
Directional selection
Outbreeding
4.Substrate binds to enzyme at the
Active site
Allosteric site
Regulatory site
Substrate-enzyme complex
5. Which of the following statements is NOT the property of an enzyme?
It is reusable.
Posses active site.
Enzyme is a fibrous protein.
Only a small amount is needed to bring about of large amount of substrates.
6. When the pH value is above or below optimum pH, the enzymatic activity will ___________.
increase.
decrease.
immediately stop.
remain unchanged.
7.The oxidation of a pyruvate to acetyl coenzyme A
occurs in cytosol
releases one molecule of carbon dioxide
requires two molecules of ATP
releases one molecule of FADH2
8. All stages below are involved in metabolic pathway that occurred in mitochondria EXCEPT for
glycolysis
Krebs cycle
link reaction
oxidative phosphorylation
9.Below are four reactions in the Krebs cycle. Which of the following reactions involves a substrate level phosphorylation?
Fumarate → Malate
Succinyl Co A → Succinate
α-ketoglutarate → Succinyl CoA
Citrate → α-ketoglutarate
10.What is the end product of pyruvate oxidation?
Acetyl CoA
Pyruvate
Water
Phosphoenolpyruvate
11. Which of the following is the product of fermentation in muscle?
Carbon dioxide
Ethanol
Lactic acid
all of the above products
12.Which of the followings is NOT TRUE of Krebs cycle?
Three molecules of NADH are produced per molecule of glucose
Two molecules of FADH2 are produced per molecule of glucose
Addition of acetyl CoA to oxaloacetate starts the cycle
GTP is produced and converted to ATP
13. How many molecules of ATP are expected to be produced from complete oxidation of 1 molecule of glucose in aerobic respiration?
32
38
64
4
14. The production of ATP during the light dependent reaction in plant is known as
photolysis
photorespiration
photophosphorylation
photosynthesis
15.The product of cyclic photophosphorylation is / are ________
ATP
NADPH
Oxygen
ATP and NADPH
16.Below are events that contribute to the occurrence of photorespiration EXCEPT ____________
during hot dry days
when oxygen concentration is higher than carbon dioxide concentration
RuBP carboxylase-oxygenase fix carbon dioxide
When stomata are closed
