quiz16 bio molecules

bio molecules Quiz-16

Dear Readers,

NEET is the most famous and important medical entrance examination held in our country. This exam is an objective type, an offline test which includes 4 sections namely– Physics, Chemistry, Botany, and Zoology. The maximum marks that can be scored are 720 marks and have 180 questions. About half of the paper consists of questions from Biology, as the NEET exam essentially focuses on capacitating students to go for seats in medical courses. One of the most significant and crucial sections in the NEET exam is of Biology. It comprises of theories, descriptions, discoveries, diagrams, definitions, explanations of differences, and relations. The majority of the topics covered in the NEET syllabus are from the NCERT syllabus of Class 11 & 12 and other related sources become part of the rest of the syllabus. Clear Exam curates a list of articles selected by professionals who recommend the highly vital topics for NEET exams. The table below takes you directly to the respective topic where the in-depth article and the MCQs are available for an easy and productive learning experience. Prior to solving NEET question papers or practicing mock tests, you must ensure to study the basic concepts in NEET and practice a few sample questions related to this exam. Students will be covered for all their studies as the topics are available from basics to even the most advanced. .

Q1.  How does radiations inactivates enzymes?

•   By destroying tertiary structure
•   By destroying primary structure
•   Both (a) and (b)
•   None of the above

Solution
(a) Radiation inactivates enzyme by destroying the tertiary structure of enzyme

Q2. Enzymes catalyses the biochemical reactions by …… the activation energy

•   Increasing
•   Lowering
•   Unaltering
•   Either (a) or (b)

Solution
(b) Enzymes catalyses the biochemical reactions by lowering the activation energy

Q3.   What is the starting point in the production of food?

•   Catabolism
•   Metabolism
•   Anabolism
•   Photosynthesis

Solution
(d) Photosynthesis is the starting point, in the production of food. It produces glucose, from which all other food materials are produced

Q4.  The free energy of a system, in a spontaneous reaction

•   Decreases
•   Increases
•   Becomes equal to zero
•   Remains unchanged

Solution
(a) The free energy of a system decreases in a spontaneous reaction

Q5. Insulin is a polymer of

•   Fructose
•   Glucose
•   Sucrose
•   Xylose

Solution
  (a) Insulin is a polymer of fructose

Q6.  Which amino acid is denoted by symbol ‘F’?

•   Phenylalanine
•   Proline
• Tryptophan
•   Methionine

Solution

Q7. The term metabolism means

•   The sum of all the enzymatically catalysed chemical reactions constantly taking place in the cells and tissues of the living organisms
•   Processes that change the small molecules into larger ones
•   Processes that converts the large molecules into smaller ones
•   None of the above

Solution
(a) The term metabolism refers to the sum of all the enzymatically catalysed chemical reactions constantly taking place in the cells and tissues of the living organisms. These include those that change the small molecules into large ones as well as those which convert the large molecules into small ones

Q8. Why metabolic pathways are comparable to automobile traffic in a city?

•   Because they have definite direction
•   Because they result in clumsiness
•   Because they result in massive production of toxic compounds
•   None of the above

Solution
(a) Flow of metabolites through metabolic pathway has a definite rate and direction like automobile traffic. These pathways criss-cross each other

Q9. Which of the following amino acids is not optically active?

•   Glycine
•   Valine
•   Leucine
•   Isoleucine

Solution
(a) Glycine is not optically active amino acid.

Q10.  Arachidonic acid is

•   Non-essential fatty acid
•   Essential fatty acid
•   Polyunsaturated fatty acid
• Both (b) and (c)

Solution
(d) Arachidonic acid is polyunsaturated (, have more than one double bond) and essential fatty acids.