Quiz-13
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.
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Q1. The proteinaceous molecule that joins a non-proteinaceous prosthetic group to form a functional enzyme is called
Solution
The enzymes which work only in the presence of cofactors are known as apoenzymes. A working combination of an apoenzyme and cofactor (mineral ion, prosthetic group or coenzyme) is called enzyme system or holoenzyme. Apoenzyme + Mineral ion/Prosthetic/ Coenzyme group Enzyme system or holoenzyme
The enzymes which work only in the presence of cofactors are known as apoenzymes. A working combination of an apoenzyme and cofactor (mineral ion, prosthetic group or coenzyme) is called enzyme system or holoenzyme. Apoenzyme + Mineral ion/Prosthetic/ Coenzyme group Enzyme system or holoenzyme
Q2. Select the correct graph, which shows the effect of temperature on the velocity of a typical enzymatic reaction
Solution
Enzymes generally function in a narrow range of temperature. Each enzyme shows its highest activity at a particular temperature, called the optimum value Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat 123
Enzymes generally function in a narrow range of temperature. Each enzyme shows its highest activity at a particular temperature, called the optimum value Low temperature preserves the enzyme in a temporarily inactive state whereas high temperature destroys enzymatic activity because proteins are denatured by heat 123
Q3. Which one is a polymer?
Solution
Glycogen is the main storage polysaccharide in animals. Like those of amylopectin, glycogen molecules are also large highly branched (branch points are 1-6 linkages) polymers of thousands of D-glucose residues linked by , 1-4 glycosidic bonds.
Glycogen is the main storage polysaccharide in animals. Like those of amylopectin, glycogen molecules are also large highly branched (branch points are 1-6 linkages) polymers of thousands of D-glucose residues linked by , 1-4 glycosidic bonds.
Q4. Variety of amino acids are formed on the basis of
Solution
Based on the nature of group, there are many amino acids
Based on the nature of group, there are many amino acids
Q5. Which one of the following amino acids was not found to be synthesized in Miller’s experiement?
Solution
Miller and Urey were the two scientists, who recreated the condition of primitive earth in laboratory and abiotically synthesized amino acids and bases. They synthesized glycine, aspartic acid and alanine in abundant quantities, while glutamic acid was not synthesized in their experiment.
Miller and Urey were the two scientists, who recreated the condition of primitive earth in laboratory and abiotically synthesized amino acids and bases. They synthesized glycine, aspartic acid and alanine in abundant quantities, while glutamic acid was not synthesized in their experiment.
Q6. The most abundant molecule in cell, is
Solution
Cellular pool consists of both organic and inorganic compounds. The relative percentage of each of these is as follow: Water – 80% Protein – 12% Lipids – 3.0% Nucleic acids – 2.0% Carbohydrates – 1.0% Inorganic salt – 1.0%
Cellular pool consists of both organic and inorganic compounds. The relative percentage of each of these is as follow: Water – 80% Protein – 12% Lipids – 3.0% Nucleic acids – 2.0% Carbohydrates – 1.0% Inorganic salt – 1.0%
Q7. The left handed DNA is called
Solution
Five forms of DNA have been reported A, B, C and D forms are right handed, while the Z-DNA is left handed
Five forms of DNA have been reported A, B, C and D forms are right handed, while the Z-DNA is left handed
Q8. Each active sites in enzyme is bounded by how many amino acids?
Solution
On the surface of enzyme, there are several sites for binding substrate molecules called active sites. It is lined by approximately 20 amino acids.
On the surface of enzyme, there are several sites for binding substrate molecules called active sites. It is lined by approximately 20 amino acids.
Q9. Cellulose is a polymer of
Solution
Cellulose is homopolysaccharide, a polymer of . The glucose monomers are linked together by , 4 linkage. Cellulose is the main constituent of plant cell wall.
Cellulose is homopolysaccharide, a polymer of . The glucose monomers are linked together by , 4 linkage. Cellulose is the main constituent of plant cell wall.
Q10. The chemical reactions which liberate energy by enzymatic oxidation of food stuffs to and , in the tissues are referred to as the
Solution
The chemical reactions which liberate energy by enzymatic oxidation of food stuffs to and in the tissues are referred to as the energy metabolism or respiratory metabolism
The chemical reactions which liberate energy by enzymatic oxidation of food stuffs to and in the tissues are referred to as the energy metabolism or respiratory metabolism
