Tag: calorific value of nutrients

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Questions Related to calorific value of nutrients

Multiple choice evs - i constituents of food dietary sources of proteins types of nutrients calorific value of nutrients

Which statement is correct for biomolecules

  1. DNA is a polymer of ribonucleotides

  2. All carbohydrates break down into glucose

  3. RNA is single stranded and contain different purine

    base than DNA

  4. Sequence of amino acids determine primary structure

    of proteins
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The shape, size, structure and biological functions of proteins are determined by the number, type and arrangement of amino acids.

Multiple choice evs - i constituents of food dietary sources of proteins types of nutrients calorific value of nutrients

Signaling between cells usually results in the activation of protein

  1. Lipases

  2. Kinases

  3. Proteases

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

One of the important mechanisms of cell communication is through reversible phosphorylation and dephosphorylation of proteins. These reactions are catalysed by kinases and occur through a cascade mechanism.

Multiple choice evs - i constituents of food dietary sources of proteins types of nutrients calorific value of nutrients

Most abundant protein in the human body is

  1. Haemoglobin

  2. Keratin

  3. Collagen

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

Collagen is the most abundant protein in the animal world which accounts for 30% of total protein content in the human body. Collagen is a key constituent of all the connective tissues. It is found in joints, bones, skin, hair, etc. This protein helps the skin to move, stretch and rebound into shape. It is present throughout the body and keeps the cells together. Without collagen the body would fall apart into pieces. 

Thus, the correct answer is option C.

Multiple choice evs - i constituents of food dietary sources of proteins types of nutrients calorific value of nutrients

The protein encoded by cry | Ab controls:

  1. Tobacco Budworm

  2. Corn Borer

  3. Bollworm

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

The Bt toxin is encoded by a gene named cry. The protein encode by cry IAb control corn borers.The protein encoded by the genes cry I Ac and cry II Ab control the cotton boll worms.

  • Thus, the correct answer is 'Corn Borer'.

Multiple choice evs - i constituents of food dietary sources of proteins types of nutrients calorific value of nutrients

Protein are needed in diet because 

  1. All amino acids are not available in body

  2. During fasting body utilized proteins

  3. Proteins act as building blocks of our body

  4. All of the above
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Proteins are essential because they provide amino acids that the body cannot synthesize on its own, serve as structural building blocks for tissues, and can be used as an energy source during periods of starvation.

Multiple choice evs - i constituents of food dietary sources of proteins types of nutrients calorific value of nutrients

The protein required for the transport of galactose across the cell membrane in E. coli is 

  1. Allolactase
  2. $\beta$-galactosidase

  3. Galactose permease

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

The numerous permeases that belong to ABC superfamily of proteins is present in number of bacterial cell. The ATP is hydrolysed by these proteins  to transport specific amino acids, sugars, vitamins, or even peptides into the cells. One such permease is galactose permease, which is responsible for transportation of galactose.

Multiple choice evs - i constituents of food dietary sources of proteins types of nutrients calorific value of nutrients

Functions that are not normally performed by proteins is/are

  1. Hydrolysis for energy provision.

  2. Structural integrity of the cell.

  3. Regulation of metabolism.

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

Proteins are the most important and versatile biomolecules in living systems. They are involved in general body-building, catalytic role as enzymes, and body defence in immunological reactions. Energy currency of living systems are usually nucleotides like ATP. They are hydrolysed to provide energy as and when required.

Multiple choice evs - i constituents of food dietary sources of proteins types of nutrients calorific value of nutrients

Identify the incorrect match between the protein and its role.

  1. Keratin structural component of hair

  2. Immunoglobulins protection of body against diseases
  3. Haemoglobin transport of $O _2$ in muscles

  4. Thrombin blood clotting
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation
The pigmented proteins in the muscle fibers which impart the red color to the muscles is called myoglobin. This protein is involved in the process of oxygen storage in the muscle tissues by binding to it. In conditions such as hypoxia oxygen is released by the myoglobin. Hence it is the oxygen trasnsporter to the muscle fibers. Thus the correct answer is option C.