Cell Biology Quiz-18
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.
Cell theory is not applicable for
Solution
(d) Viruses do not have any living characteristic except replication but replication happens only when living cells are available to assist them. Cell theory is not applicable for viruses
(d) Viruses do not have any living characteristic except replication but replication happens only when living cells are available to assist them. Cell theory is not applicable for viruses
Q2.
Export firm of the body is
Solution
(a) Golgi bodies are helpful in transportation of different substances and transformation of membranes of one type into another. Golgi bodies form acrosome during spermatogenesis, also take part in the formation of a number of products from glycoprotein, complex heteropolysaccha-rides.
(a) Golgi bodies are helpful in transportation of different substances and transformation of membranes of one type into another. Golgi bodies form acrosome during spermatogenesis, also take part in the formation of a number of products from glycoprotein, complex heteropolysaccha-rides.
Q3.
Middle lamella is mainly composed of
Solution
(c) The middle lamella is cementing layer between the cells. It is made up of calcium and magnesium pectates. The basic chemical unit of pectin is galacturonic acid, which have the capability of salt formation with calcium and magnesium (an acid base reaction).
(c) The middle lamella is cementing layer between the cells. It is made up of calcium and magnesium pectates. The basic chemical unit of pectin is galacturonic acid, which have the capability of salt formation with calcium and magnesium (an acid base reaction).
Q4.
What is C-value paradox?
Solution
(b) Each species has a characteristic content of DNA, which is constant in all the individuals of that species and has thus been called the C-value. Eukaryotes vary greatly in DNA content but always contain much more DNA than prokaryotes. Lower eukaryotes have less DNA such as nematode Caenorhabditis elegans, which has only 20 times more DNA then E.coli or the Drosophila, which has 40 times more DNA (ie., 0.18 pg). Man has about 3.2×10^9bp of DNA per haploid genome. This huge variation in C-value between species is called C-value paradox.
(b) Each species has a characteristic content of DNA, which is constant in all the individuals of that species and has thus been called the C-value. Eukaryotes vary greatly in DNA content but always contain much more DNA than prokaryotes. Lower eukaryotes have less DNA such as nematode Caenorhabditis elegans, which has only 20 times more DNA then E.coli or the Drosophila, which has 40 times more DNA (ie., 0.18 pg). Man has about 3.2×10^9bp of DNA per haploid genome. This huge variation in C-value between species is called C-value paradox.
Q5.
Which of the following cell organelles stores hydrolytic enzymes?
Solution
(b) Lysosomes are the single membrane bound cell organelles, which contain hydrolytic enzymes. These are also known as suicidal bags.
(b) Lysosomes are the single membrane bound cell organelles, which contain hydrolytic enzymes. These are also known as suicidal bags.
Q6.
Flagella of prokaryotic and eukaryotic cells differ in
Solution
(c) Flagella of prokaryotic and eukaryotic cells differ in micro-tubular organization and type of movement. In eukaryotes, that arrangement is (9+2) and specialised while in prokaryotes, arrangement is (9+0) and is simple.
(c) Flagella of prokaryotic and eukaryotic cells differ in micro-tubular organization and type of movement. In eukaryotes, that arrangement is (9+2) and specialised while in prokaryotes, arrangement is (9+0) and is simple.
Q7.
Golgi body originates from
Solution
(b) Golgi body originates from endoplasmic reticulum.
(b) Golgi body originates from endoplasmic reticulum.
Q8.
According to cell doctrine, which of the following statements are incorrect?
I. The bodies of all living beings are made up of cells and their products
II. Cells are the basic units of structure in the body of living organisms
III. Cells are the basic units of function in living organisms that is, the activities of an organisms are the sum total of the activities of its cells
IV. Genetic information is stored and expressed inside the cells
Choose the correct option
Solution
(d) All statements are correct
(d) All statements are correct
Q9.
Important site for formation of glycoproteins and glycolipids is
Solution
(a) The Golgi apparatus principally performs the function of packaging materials. Golgi apparatus is the main site of formation of glycoproteins and glycolipids.
(a) The Golgi apparatus principally performs the function of packaging materials. Golgi apparatus is the main site of formation of glycoproteins and glycolipids.
Q10.
Middle lamella is composed of
Solution
(b) Middle lamella is a thin binding layer between the cell wall of adjacent plant cell. It is chemically formed of calcium and magnesium pectate.
(b) Middle lamella is a thin binding layer between the cell wall of adjacent plant cell. It is chemically formed of calcium and magnesium pectate.
