Tag: zoology

Questions Related to zoology

In which molecule is energy stored in the body?

  1. RNA

  2. DNA

  3. ADP

  4. ATP

Correct Option: D

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'.

In structure ATP is similar to

  1. DNA (deoxyribonucleotide)

  2. RNA(ribonucleotide)

  3. Ribonucleoside

  4. Deoxyribonucleoside

Correct Option: A

ATP means Adenosine Tri Phosphate, is a energy rich ribonucleoside. It is similar to ribonucleoside.

So correct option is 'Ribonucleoside'.

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

  1. ATP

  2. Diffusion

  3. Osmosis

  4. Kinetic energy

Correct Option: A

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. 

The common immediate source of energy for cellular activity is

  1. NAD.

  2. ATP.

  3. DNA.

  4. RNA.

Correct Option: B

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.

The currency of energy in a typical living cell is

  1. ATP molecule.

  2. ADP molecule.

  3. Glucose molecule.

  4. Haemoglobin molecule.

Correct Option: A

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. 

Which of the following elements is needed as a component in cell membranes, nucleic acids and energy transfer?

  1. Sulphur

  2. Phosphorus

  3. Calcium

  4. Potassium

Correct Option: B
Phosphorus is a constituent of cell membranes, certain proteins, all nucleic acids and nucleotides. This element is involved in energy transfer such as ATP and ADP and activates coenzymes for amino acid production which is necessary for  protein synthesis. Further phosphorous is also a required for other metabolic processes such as photosynthesis, glycolysis, respiration and fatty acid synthesis.
Therefore, the correct answer is option B.

The assimilatory power in photosynthesis is

  1. ATP.

  2. NADPH.

  3. ATP and NADPH$ _2$.

  4. ATP, NAPDH and CO$ _2$.

Correct Option: C

The phase of reactions in photosynthesis which involves the direct sunlight is called light reaction. This reaction takes place inside the grana of chloroplast. In this reaction assimilatory power ATP and NADPH$ _2$ are generated with evolution of oxygen and photolysis of water. These assimilatory powers help in the fixation of carbon dioxide during dark phase reaction.

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

Correct Option: B
Free energy is the capacity of a system to do work in an exothermic reaction
So, the correct answer is 'Free energy'

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

Correct Option: A

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'

In ATP, high energy bond is present between 

  1. Nucleoside and phosphate group

  2. Sugar and phosphate group

  3. Base and phosphate group

  4. None of the above

Correct Option: D
ATP is known as energy currency of the cell. It has three phosphate out of which one is directly attached to the ribose with phosphate ester bond and it is low energy bond. The bond between two phosphate groups is a phosphoanhydride bond which is considered as high energy bond. So ATP has two high energy phosphoanhydride bonds.
So, the correct answer is option D.