Biology

Cellular Respiration and Enzymes

1,551 Questions

Explore key concepts of cellular respiration, including glycolysis, the Krebs cycle, and the electron transport chain. These questions also cover ATP production, anaerobic respiration, and essential metabolic pathways. This topic forms a core part of the biology syllabus for many competitive examinations.

Glycolysis and metabolic pathwaysKrebs cycle processesElectron transport chainATP production countAnaerobic respiration products

Cellular Respiration and Enzymes Questions

Multiple choice biology simple nutrients into cells blood and its components components of blood composition of blood

In blood, the main buffers are

  1. Na$^+$ and K$^+$.

  2. Sodium di-hydrogen phosphate and sodium mono-hydrogen phosphate.

  3. Carbonic acid and bicarbonate.

  4. Ammonium acetate.
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
A Buffer is an aqueous solution that resists changes in pH when acids or bases are added to it. The main buffer in the blood contains a large amount of carbonic acid, a weak acid, and bicarbonate, a base. Together, they help to maintain the pH of the blood at 7.4. The bicarbonate buffer system is an acid-base mechanism to maintain the balance of pH in the blood, in order to support proper metabolic functions.
So the correct answer is C.
Multiple choice zoology our health harmful microorganism for humans microbes and diseases categories of diseases

Which one of the following metabolic conversions requires oxygen > 

  1. Glucose to pyruvate
  2. Glucose to $CO _2$ and ethanol

  3. Glucose to lactate
  4. Glucose to $CO _2$ and $H _2O$
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Aerobic respiration requires oxygen to fully oxidize glucose into carbon dioxide and water. The other options describe anaerobic processes or partial oxidation.

Multiple choice zoology respiration and energy transfer active transport and passive transport types of plant transport atp

Energy currency/coin of cell is

  1. ATP

  2. NAD

  3. ADP

  4. GDP
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

ATP is adenosine triphosphate. It is formed of an adenine, a ribose and three phosphate radical attached to ribose. It is a storehouse of energy. It is found in all living cell. ATP is called energy currency as well as an energy carrier of the cell. ATP usually obtains energy during respiration. It provides energy for membrane transport, nerve conduction, cell movement, cell division etc. Breakage of one phosphate bond in the presence of ATP-ase and releases of 8.9Kcal per mole. Thus, the correct option is A.

Multiple choice zoology respiration in organisms active transport and passive transport types of plant transport atp

Which of the following is energy rich compound formed in cellular respiration?

  1. ADP

  2. Glucose

  3. Water

  4. ATP

  5. Oxygen
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

During cellular respiration, the energy formed in mitochondria is stored in the form of ATP which is also known as energy currency of the cell. It provides energy for all the life activities by its breakdown into ADP and Pi. ATP contains three phosphate group which has high energy bond. On the hydrolysis of ATP energy is released and ADP formed.

Multiple choice zoology respiration in organisms active transport and passive transport types of plant transport atp

Which one of the following is known as energy currency of cell?

  1. Adenosine diphosphate

  2. Adenosine triphosphate

  3. Pyruvate

  4. Glucose
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Adenosine triphosphate (ATP) is known as the energy currency of the cell. There are three phosphate bonds which store a large amount of energy. When these bonds are broken down, the energy is released. The energy is used to carry out biochemical reactions in the cell.

Thus, the correct answer is option B. 

Multiple choice zoology respiration in organisms active transport and passive transport types of plant transport atp

In which molecule is energy stored in the body?

  1. RNA

  2. DNA

  3. ADP

  4. ATP
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Adenosine triphosphate is a nucleotide also known as the energy currency of the cell that stores the energy in the form of phosphate bonds. When this bond breaks energy releases.

DNA and RNA are the genetic material of the living organism.
So the correct option is 'ATP'.

Multiple choice zoology respiration in organisms active transport and passive transport types of plant transport atp

The energy necessary for active transport across cytoplasmic membranes is believed to come from

  1. ATP

  2. Diffusion

  3. Osmosis

  4. Kinetic energy
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

ATP is the energy currency of our body produced by the oxidation of food in the cell. ATP is utilized to proceed different metabolic process. Active transport is the movement of molecules across a cell membrane in the direction against the concentration gradient i.e., moving from an area of lower concentration to an area of higher concentration with the involvement of energy in the form of ATP. 

Multiple choice zoology respiration in organisms active transport and passive transport types of plant transport atp

The common immediate source of energy for cellular activity is

  1. NAD.

  2. ATP.

  3. DNA.

  4. RNA.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Cellular respiration is the set of metabolic processes that take place in the cells. In this process glucose is oxidized through the metabolic pathways like glycolysis in cytoplasm and Krebs's cycle in mitochondria and produces energy in the form of ATP. ATP is further utilized by the different cell for their activities.

Multiple choice zoology respiration in organisms active transport and passive transport types of plant transport atp

The currency of energy in a typical living cell is

  1. ATP molecule.

  2. ADP molecule.

  3. Glucose molecule.

  4. Haemoglobin molecule.
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Various metabolic processes in our body utilize ATP as a source of energy. It is considered as energy currency of cells as it stores the chemical energy of food molecules to be utilized as and when required by the body. 

Multiple choice zoology respiration in organisms active transport and passive transport types of plant transport atp

Organisms undergo processes that require energy and produce energy. Processes such as photosynthesis, cellular respiration, reproduction, and movement are just a few of these processes. Which of these best describes the energy available to do cellular work?

  1. Heat

  2. Free energy

  3. Potential energy

  4. Kinetic energy
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
Free energy is the capacity of a system to do work in an exothermic reaction
So, the correct answer is 'Free energy'
Multiple choice zoology respiration in organisms active transport and passive transport types of plant transport atp

Which of the following is called energy currency of the cell?

  1. ATP
  2. NADP$H _2$
  3. $C _6 H _{12}O _6$
  4. $C _2 H _5$OH
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The energy currency of the cell is ATP (Adenosine triphosphate).

During a cellular reaction, all the energy is not released as free energy but some of it is stored in ATP as chemical energy.
The phosphate bonds in ATP are high energy bonds and they are broken whenever the cell requires energy. It is used in various energy-requiring processes of the cell.

So, the correct option is 'ATP'

Multiple choice zoology respiration in organisms active transport and passive transport types of plant transport atp

Energy liberated during respiration is stored as

  1. ATP

  2. ADP

  3. FAD

  4. NADP
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Cellular respiration requires oxidation of organic substrates for the liberation of energy. The energy released is stored in every living cell in the form of a universal high energy molecule called ATP or adenosine triphosphate.

So the answer is 'ATP'.

Multiple choice zoology respiration in organisms active transport and passive transport types of plant transport atp

ATP is

  1. Adenine triphosphate

  2. Adenosine tetraphosphate

  3. Adenosine triphosphate

  4. Adenine tetraphosphate
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Adenosine triphosphate is the long form of ATP, it is the complex organic chemical that participates in many processes. Found in all forms of life, ATP is often referred to as the "molecular unit of currency" of intracellular energy transfer.

So, the correct option is C.

Multiple choice zoology respiration in organisms active transport and passive transport types of plant transport atp

When ATP molecules is hydrolysed in ADP, then the quantity of energy released is about

  1. 120 cal

  2. 1,200 cal

  3. 12,000 cal

  4. 1,20,000 cal
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The hydrolysis of ATP to ADP releases approximately 7.3 kcal/mol, which is equivalent to about 7,300 calories. Among the choices, 12,000 calories is the standard approximation used in many textbooks for this biological process.