Self Studies
Self Studies
Self Studies
Self Studies

Biomolecules Test - 40

Result Self Studies

Biomolecules Test - 40
  • Score

    -

    out of -
  • Rank

    -

    out of -
TIME Taken - -
Self Studies

SHARING IS CARING

If our Website helped you a little, then kindly spread our voice using Social Networks. Spread our word to your readers, friends, teachers, students & all those close ones who deserve to know what you know now.

Self Studies Self Studies
Weekly Quiz Competition
  • Question 1
    1 / -0

    The graph given shows the effect of substrate concentration on the rate of reaction of the enzyme.

    What does the graph indicate?

    Solution
    • According to Michaelis- Menton equation, the rate of reaction is directly proportional to the substrate concentration. With an increase in the substrate concentration, the velocity or rate of the reaction also increases. 
    • It has been proved experimentally that if the enzyme concentration is kept constant and the substrate concentration is increased gradually, the rate of the reaction will increase until it reaches a maximum. After this point, the increase in substrate concentration will not increase the rate of the reaction and the graph will reach a saturation point.
    • The given graph initially follows the above law, but after reaching the maximum substrate concentration the rate of the reaction declines with increase in the substrate concentration. This can only happen when there is presence of enzyme inhibitor in the reaction mixture. The enzyme inhibitor will prevent the enzyme from binding to the substrate, resulting in no formation of a product. 
    • Thus, the graph shows a declining rate even with an increase in the substrate concentration.
  • Question 2
    1 / -0
    The effectiveness of an enzyme is affected least by
    Solution
    On addition of an enzyme to a reaction system it accelerates the rate of chemical reaction in the forward direction by reducing the activation energy, which otherwise will be very high
    So, the correct answer is 'initial activation energy of the system'
  • Question 3
    1 / -0
    The products of proteins catabolism are
    Solution
    Proteins are nitrogen containing biomolecules. They are catabolised into carbon dioxide, ammonia, urea in terrestrial vertebrates. Aquatic animals directly excrete ammonia as ammonia is very toxic and highly soluble in water. Terrestrial vertebrates do not excrete ammonia as they have to conserve water and excreting ammonia will require a lot of water. Thus terrestrial vertebrates like mammals convert ammonia into urea in liver and excrete urea. Uric acid is least soluble in water and is excreted by birds.
  • Question 4
    1 / -0
    ............... is common in feather and silk.
    Solution
    Proteins are the most versatile biomolecules important for a variety of structural and functional roles. Silk is a protein fiber made up of fibroin protein. Skin of birds is covered by feathers. Feathers are composed of keratin proteins.
  • Question 5
    1 / -0
    Which of the following is main enzyme of plasma membrane?
    Solution
    ATPase are a class of enzymes that catalyze the dephosphorylation of ATP into ADP and a free phosphate ion. This dephosphorylation reaction releases energy, which the enzyme harnesses to drive other chemical reactions that would not otherwise occur. This process is widely used in all known forms of life. Such enzymes are integral membrane proteins anchored within biological membranes (plasma membrane), and move solutes across the membrane, typically against their concentration gradient.
  • Question 6
    1 / -0
    ......... is the essential component of all living organisms.
    Solution
    Proteins are the most versatile biomolecules having a variety of structural and functional roles. Proteins are body building biomolecules found in all classes of organisms. Certain biomolecules are present in only particular group of organisms. For example, hemoglobin is the respiratory pigment found in higher animals only. Chlorophyll are found in photosynthetic autotrophic organisms only. No living system is possible without proteins. Hence, proteins are the essential components of all living organisms.
  • Question 7
    1 / -0
    Proteins are conducted in the body in which of the following form?
    Solution
    Proteins are polymers of amino acids. In the body, proteins are broken down into amino acids during digestion and are absorbed as amino acids. For transport within body proteins are transported as amino acids in general circulation.
  • Question 8
    1 / -0
    Which of the following will be different in different animals?
    Solution
    Proteins are very versatile biomolecules performing different structural and functional roles. Proteins are also information molecules having amino acids joined together in a unique sequence which is decided by the sequence of nucleotides in nucleic acids DNA and RNA. Because different animals will have different sequence of nucleotides in DNA, the proteins synthesized in their body will also have different sequence of amino acids.
  • Question 9
    1 / -0
    Which element is normally absent in proteins?
    Solution
    Proteins are polymers of amino acids. Proteins are formed when several amino acids are joined together by peptide bonds. Amino acids are compounds made up of carbon, hydrogen, nitrogen and oxygen. Amino acids contain two functional groups the carboxylic group and the amino group. Some amino acids like methionine and cysteine contain sulphur in addition to carbon, hydrogen, nitrogen and oxygen. Phosphorous is generally absent from the primary structure of proteins. Some conjugate proteins like phosphoproteins may, however, contain phosphorous but not as a primary constituent of proteins.
    Thus, the correct answer is option D. 
  • Question 10
    1 / -0
    Which of the following protein is the most abundant in human body? 
    Solution
    The most abundant protein in the human body is collagen. Collagen is the main structural protein of the various connective tissues in animals. As the main component of connective tissue, it is the most abundant protein in mammals, making up from 25% to 35% of the whole-body protein content. Collagen, in the form of elongated fibrils, is mostly found in fibrous tissues such as tendons, ligaments and skin. It is also abundant in corneas, cartilage, bones, blood vessels, the gut, and the dentin in teeth. In muscle tissue, it serves as a major component of the endomysium. 
    So, the correct answer is option A.
Self Studies
User
Question Analysis

  • Correct -

  • Wrong -

  • Skipped -

My Perfomance
  • Score

    -

    out of -
  • Rank

    -

    out of -
Re-Attempt Weekly Quiz Competition
Self Studies Get latest Exam Updates
& Study Material Alerts!
No, Thanks
Self Studies
Click on Allow to receive notifications
Allow Notification
Self Studies
Self Studies Self Studies
To enable notifications follow this 2 steps:
  • First Click on Secure Icon Self Studies
  • Second click on the toggle icon
Allow Notification
Get latest Exam Updates & FREE Study Material Alerts!
Self Studies ×
Open Now