The overall goal of glycolysis, Krebs cycle and the electron transport system is the

formation of:

  • ATP in small stepwise units

  • ATP in one large oxidation reaction

  • Sugars

  • Nucleic acids

How many ATP molecules could maximally be generated from one molecule of glucose, if

the complete oxidation of one mole of glucose to CO2 and H2O yields 686 kcal and the

useful chemical energy available in the high energy phosphate bond of one mole of ATP is

12 Kcal?

  • Two 

  • Thirty

  • Fifty seven

  • One

The TCA cycle is considered as an aerobic pathway because

the cycle.

  • all enzymes of the cycle use molecular oxygen

  • some enzymes of the cycle require molecular oxygen

  • molecular oxygen is essential to reoxidise the coenzymes reduced during operation of

  • in absence of oxygen, the enzymes of TCA cycle are denatured.

In Krebs' cycle, GTP is formed in

  • substrate level phosphorylation

  • oxidative phosphorylation

  • non-cyclic photophosphorylation

  • cyclic photophosphorylation

In respiration from 180g of glucose which of the following is formed?

  • 264gm CO2+190gm H2O+391 Kcal

  • 264gm CO2+108gm H2O+686 Kcal

  • 390gm CO2+108gm H2O+686 Kcal

  • 390gm CO2+ 264gm H2O+391 Kcal

Glycolysis is found in cytoplasm of virtually all types of aerobic/anaerobic cells. In this

process, glucose is converted into :

  • PEP

  • acetyl CoA

  • pyruvic acid

  • citric acid.

Which of the following is the connecting link between glycolysis and Krebs cycle?

  • Acetyl Co-A

  • Oxalosuccinic acid

  • Pyruvic acid

  • Citric acid 

The enzyme decarboxylase catalyses the following step

  • conversion of citric acid to cis aconitic acid

  • fumaric acid to malic acid

  • oxalosuccinic acid to o-ketoglutaric acid

  • malic acid to oxaloacetic acid.

Which of the following is true regarding the given electron transport chain?
CoQ →Cyt c →Cyt aa3→O2(a) CoQ →Cyt c is H+ absorbing site.(b) aa3 → O2, H+ yielding site.(c) CoQ → Cyt c is H+ yielding site and aa3→O2 is H+ absorbing site.(d) No H+ is absorbed or released
  • 1
  • 2
  • 3
  • 4

After glycolysis, fate of glucose in mitochondrial matrix is

  • oxidation

  • reduction

  • oxidative decarboxylation

  • hydrolysis.

Which enyme helps in transfer of phosphate group from ATP to carbohydrate?

  • Phosphate

  • ATPase

  • Phosphorylase

  • Catalase

Which one is correct sequence occuring in glycolysis?

  • G-6-P →PEP →3-PGAL →3-PGA

  • G-6-P →3-PGAL → 3-PGA →PEP

  • G-6-P →PEP →3-PGA →3-PGAL

  • G-6-P →3-PGA →3-PGAL →PEP

In which of the following reactions of glycolysis, a molecule of water is removed from the substrate?

  • () Glucose → Glucose-6-phosphate
  • () Fructose-6-phosphate → Fructose-1,6 bisphosphate
  • () 2-phosphoglycerate →Phosphoenol pyruvate
  • () Phosphoenol pyruvate →Pyruvate

Aerobic respiration produces more usable chemical energy than fermentation, because fermentation involves

  • formation of lactic acid 

  • complete oxidation of food

  • partial oxidation of food 

  • evolution of CO2 and alcohol

RQ (Respiratory Quotient) is defined as

  •  Volume of CO2 evolved = Volume of O2 consumed

  •   Volume of O2 consumedVolume of CO2 evolved

  •  Volume of CO2 evolvedVolume of O2 consumed

  •  Volume of O2 evolvedVolume of CO2 consumed

The colour in the brown fat is due is

  • its larger capacity for generating heat

  • large number of mitochondria present

  • a high concentration of iron containing cytochrome pigments

  • presence of chromatophores

Cell respiration is carried out by 

  • ribosome 

  • mitochondria

  • chloroplast

  • Golgi bodies

The process by which ATP is produced in the inner membrane of a mitochondrion. The electron transport system transfers protons from the inner compartment of the outer; as the protons flow back to the inner compartment, the energy of their movement is used to add phosphate to ADP, forming ATP.

  • Chemiosmosis

  • Phosphorylation

  • Glycolysis

  • Fermentation

Assertion   :       Aerobic animals are not truely aerobic.

Reason      :       They produce lactic acid anaerobically.
  • If both the ssertion and the reason are true and the reason is a correct explanation of the assertion
  • If oth the assertion and reason are true but the reason is not a correct explanation of the assertion
  • If the assertion is true but the reason is false
  • If both the assertion an reason are false

Assertion      :       Carbohydrates are more suitable for the production of energy in the body than proteins and fats.

Reason         :       Carbohydrates can be stored in the tissues as glycogen for use in the production of energy, whenever necessary.

  • If both the ssertion and the reason are true and the reason is a correct explanation of the assertion
  • If oth the assertion and reason are true but the reason is not a correct explanation of the assertion
  • If the assertion is true but the reason is false
  • If both the assertion an reason are false

Assertion      :       The mode of nutrition in higher animals is heterotrophic.

Reason         :       Animals can use different trophic levels for heterotrophic nutrition.

  • If both the ssertion and the reason are true and the reason is a correct explanation of the assertion
  • If oth the assertion and reason are true but the reason is not a correct explanation of the assertion
  • If the assertion is true but the reason is false
  • If both the assertion an reason are false

Which of the following is true about respiration

  • it is for energy liberation

  • it can occur both O2 presence and its absence

  • In humans R.B.C show anaerobic respiration

  • All of these

The energy which is required for life processes is obtained by

  • A. Hydrolysis of Mcromolecules
  • B. Hydrolysis of food
  • C. Oxidation of Maromolecules
  • D. Carboxylation of Macromolecules

The following statements are true except

  • All the food that is respired for the life processes comes from photosynthesise

  • Carnivores depend indirectly on plants for their food

  • Saprophytes depend on dead and decaying matter

  • Respiration is a metabolic process occurs intercellular spaces

Respiration is

  • Breaking of a type of bonds like ionic or non ionic of complex compounds through oxidation within the cell by utilizing bulk of energy

  • Breaking of C-C bonds of simple molecules through hydrolysis within the cell by releasing energy

  • Breaking of C-C bonds of complex molecules through oxidation within the cell to release considerable amount of energy

  • Breaking of C-C bonds of complex molecules through hydrolysis within the cell by releasing energy

Respiratory substrate are the compounds

  • Which get oxidized during Respiration

  • Which get hydrolysed during Respiration

  • Which get reduced during Respiration

  • Which catalyze the process of Respiration

Which of the following act as a respiratory substrate under certain conditions in some plants?

  • Glucose

  • Starch

  • Protein

  • Carbohydrate

Which of the following act as respiratory substrate under certain conditions in the plant?

  • Protein

  • Organic Acid

  • Fats

  • All of these

The energy in Respiration is

  • Released in a single step

  • Released in multiple step processes and is trapped in the form of ADP

  • Released in step wise reactions controlled by ribozymes

  • Released in step wise reactions controlled by enzymes and is trapped as ATP

Carbon skeletons produced during respiration is

  • Used as energy source

  • Used as precursors for biosynthesis of other molecules in the cell

  • Used for synthesis of ATP by ATP synthase

  • Used as remanant of biosynthesis of proteins

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