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Test: Concept of Metabolism, Metabolic Basis & The Living State


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10 Questions MCQ Test Biology Class 11 | Test: Concept of Metabolism, Metabolic Basis & The Living State

Test: Concept of Metabolism, Metabolic Basis & The Living State for NEET 2023 is part of Biology Class 11 preparation. The Test: Concept of Metabolism, Metabolic Basis & The Living State questions and answers have been prepared according to the NEET exam syllabus.The Test: Concept of Metabolism, Metabolic Basis & The Living State MCQs are made for NEET 2023 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Test: Concept of Metabolism, Metabolic Basis & The Living State below.
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Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 1

The amount of usable energy available for doing work when the temperature and pressure are uniform throughout the system is called

Detailed Solution for Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 1

Amount of usable energy which is available for doing work when the temperature and pressure are uniform throughout the system is called gibbs free energy.

△G is a change in gibbs free energy.

Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 2

Which of the following is an anabolic pathway?

Detailed Solution for Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 2

Anabolic pathways require an input of energy to synthesize complex molecules from simpler ones.
Example: Synthesis of large proteins from amino acid building blocks, and the synthesis of new DNA strands from nucleic acid building blocks.

These biosynthetic processes are critical to the life of the cell, take place constantly, and demand energy provided by ATP and other high-energy molecules like NADH (nicotinamide adenine dinucleotide) and NADPH.

Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 3

A living state is in

Detailed Solution for Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 3

Living organisms are not in equilibrium because the system at equilibrium cannot perform work. As living organisms work continuously, they cannot afford to reach equilibrium. 

The living organisms exist in a steady-state characterized by the concentration of each of the biomolecules. These biomolecules are in metabolic flux.

 

Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 4

One mole of glucose on metabolism liberate how many kilo calories of energy?

Detailed Solution for Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 4

On complete combustion of one glucose molecule into carbon dioxide and water, the great amount of energy is released i.e. about 686 kilocalories. On the metabolism of the glucose molecule, it can take place by the process of respiration in which energy is released in the form of ATP.

Respiration can takes place by two mechanisms:
(I) Aerobic respiration: This is the process in which the metabolism takes place in the presence of oxygen.
(II) Anaerobic respiration: This process takes place in the absence of oxygen.
The ATP production rate changes with the type of respiration. In aerobic respiration the net ATP produced is 38. One ATP yields approximately 10 kilocalories of energy. Thus, the energy liberated during the metabolism of one mole of glucose is 380 kilocalories.

The correct option is D i.e. 380.

Additional information: The respiration mainly involves 3 processes that are:
- Glycolysis: In this process the glucose (6C) molecule gets converted into the two molecules of pyruvate (3C). The pyruvate formed is converted into Acetyl coA in presence of ions and pyruvate dehydrogenase enzyme.
- Kreb’s cycle: It is also known as Tricarboxylic acid cycle (TCA) or citric acid cycle. In this process Acetyl coA is entered into the TCA cycle which is the cyclic process. It is responsible for the production of ATP in large amounts. It takes place in a mitochondrial matrix.
- Electron transport system: In this system, the NADH and FADH formed in the krebs cycle are utilized and produce 3 molecules of ATP and 2 molecules of ATP respectively.
 

Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 5

Chemical reactions require energy for

Detailed Solution for Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 5

All chemical reactions, including exothermic reactions, need activation energy to get started.
Activation energy is needed so reactants can move together, overcome forces of repulsion, and start breaking bonds.

Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 6

The rate of energy metabolism is equivalent to the

Detailed Solution for Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 6

The rate of oxygen consumption is commonly used to infer metabolic energy use in heterotrophic organisms because these organisms use oxygen in respiration to release energy via the Krebs cycle. 

Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 7

Process in which activation or inhibition of an enzyme by a small regulatory molecule is called

Detailed Solution for Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 7

Allosteric control refers to a type of enzyme regulation involving the binding of a non-substrate molecule, known as the allosteric effector, at locations on the enzyme other than the active site.

Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 8

The turnover of biomolecules is together called

Detailed Solution for Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 8

All the biomolecules are constantly being changed into some other biomolecules and also made from some other biomolecules. The turnover of biomolecules takes place continuously. All these reactions are together called metabolism.

Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 9

The energy content in kcal/g of carbohydrate : protein : tri-glycerol is approximately in the ratio of

Detailed Solution for Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 9

Calories are needed to provide energy so, the body functions properly. The number of calories in a food depends on the amount of energy the food provides.

The number of calories a person needs depends on age, height, weight, gender and activity level. People who consume more calories than they bum off in normal daily activity or during exercise are more likely to be overweight.
Fat (1 gram) = 9 calories
Protein (1 gram) = 4 calories
Carbohydrates (1 gram) = 4 calories
Tri-glycerol is an ester derived from glycerol and three fatty acids. It is the main constituent of vegetable oil and animal fats.

Therefore, the approximate ratio of the energy content in kcal/g of carbohydrate: protein : tri-glycerol is 1 : 1 : 2.

Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 10

Which of the following is a catabolic pathway?

Detailed Solution for Test: Concept of Metabolism, Metabolic Basis & The Living State - Question 10

Catabolic pathways involve the degradation of complex molecules into simpler ones, releasing the chemical energy stored in the bonds of those molecules. Conversion of glucose to lactic acid glucose molecule is catabolic pathway.

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