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WorksheetsBio-catalyst 2
Total questions: 20
Worksheet time: 10mins
The breeding of pure breed dogs is an example of?
Natural selection
Disruptive selection
Artificial selection
Stabilising selection
In a hypothetical population of birds with different wing sizes, which selection selects for individuals with medium sized wings?
Directional selection
Stabilizing selection
Disruptive selection
Natural selection
Speciation that is caused by breeding occurring at different times of the day is called............................
Behavioral isolation
Temporal isolation
Mechanical isolation
Habitat isolation
The best definition of species involves the.............
interbreeding capability
morphological similarities
habitat similarities
physiological similarities
A mule is the offspring of a male donkey and a female horse. A horse has a karyotype of 64 chromosomes and donkey has a karyotype of 62 chromosomes. The mule hybrid has a 63 chromosomes and sterile. Which of the following isolating mechanism prevents mule from produced gamete?
Ecological isolation
Reduced hybrid viability
Hybrid breakdown
Reduced hybrid fertility
How does an enzyme increase the rate of reaction?
By shifting the equilibrium point of reaction
By supplying the energy required to start the reaction
By increasing the rate of random collision of molecules
By bringing the reactant molecules to the correct orientation
Increasing the substrate concentration in an enzymatic reaction could overcome which of the following?
allosteric inhibition
competitive inhibition
denaturization of the enzyme
saturation of the enzyme activity
How does a noncompetitive inhibitor decrease the rate of an enzyme reaction?
By acting as a coenzyme for the reaction
By binding at the active site of the enzyme
By changing the shape of the enzyme's active site
By changing the free energy change of the reaction
The following factors can cause the denaturation of enzymes EXCEPT
Extreme pH
Competitive inhibitor
Effects of metal ion
High temperature
Which of the following is example of coenzyme?
Zinc
Lipase
Vitamin B2
Lysine
In the conversion of glucose into two molecules of pyruvate, which process does not occur?
Release of CO2
Hydrolysis of ATP
Reduction of NAD
Phosphorylation of hexose
Most of the NADH that delivers electrons to the electron transport chain comes from which of the following?
Glycolysis
Krebs cycle
Oxidative phosphorylation
Substrate-level phosphorylation
During respiration in a eukaryotic cell, the electron transport chain is located in or on the.............................
cytosol
matrix of mitochondria
inner membrane of mitochondria
intermembrane space of mitochondria
Which of the following is true about substrate-level phosphorylation?
A phosphate is transferred to a sugar
A phosphate is transferred from the ATP to a protein
A phosphate is transferred from the substrate to ADP
A phosphate is transferred from the ATP to the substrate
According to the chemiosmosis theory, ATP is synthesized when
Electron is transferred from one carrier to another carrier
Hydrogen atom reacts with oxygen molecule to from water
Proton (H+ ion) diffuses from intermembrane space into the mitochondrial matrix through ATP synthase
Proton (H+ ion) is pumped from the mitochondrial matrix into the intermembrane space
In photosynthesis, ______oxidized and _______is reduced
Glucose,oxygen
Carbon dioxide,water
Water,carbon dioxide
Glucose,carbon dioxide
What are the products formed during light dependent reaction of photosynthesis?
CO2, ATP and glucose
ATP, carbon and water
ATP, NAD+ and oxygen
ATP, NADPH and oxygen
C3 plant are so called because ………………………………………
CO2 binds to RuBP
It uses RuBP carboxylase enzyme in photosynthesis
It produced oxaloacetate as the first intermediate product
It produced glycerate-3-phosphate as first intermediate product
Name the structure where the light independent reaction occurs?
Stroma
Stoma
Thylakoids
Stroma and thylakoids
What is the final electron acceptor during non-cyclic photophosphorylation?
ATP
Photosystem I
Photosystem II
NADP+
