Cell Biology Quiz-19

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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.   Which of the following maintains continuity between the water and lipid phases inside and outside the cells?
  •  Cell Wall
  •  Lecithin
  •  Cell vacuole
  •  Cell membrane of woody plants
(b) The smooth endoplasmic reticulum produces nearly all of the lipids required for the elaboration of new cell membranes, including both phospholipids and cholesterol. The major phospholipid is made up of phosphatidylcholine also called lecithin. Lecithin maintains continuity between the water and lipid phases inside and outside the cell.

Q2.   Plasmodesmata are
  •  Lignifiesd cemented between cells
  •  Locomotory structures
  •  Membranes connecting the nucleus with plasmalemma
  •  Connections between adjacent cells
(d) The primary cell wall contains many small openings or pores situated in primary pit fields. The cytoplasm of adjacent cells communicates through the pores by means of cytoplasmic bridges called plasmodesmata. The plasmodesmata permit circulation of fluids and passage of solutes between cells.

Q3.   Amino acid binding site in tRNA is
  •  5’ end
  •  Anticodon loop
  •  CCA 3’ end
  •  DHU loop
(c) tRNA is synthesised in nucleus and transfers to cytoplasm. It keeps up amino acid to its CCA 3’ end and transfers it to ribosome during translation process.
Q4.   Which of the following is not a function of vacuole in plant cell?
  •  Storage
  •  Waste disposal
  •  Cell elongation and protection
  •  Production of the hydrogen peroxide
(d) The central vacuole of plant cells function in storage, waste disposal, cell elongation and protection, whereas peroxisomes produce hydrogen peroxides as a waste product.

Q5.   In prokaryotic cell, flagella, if present are I. single-stranded II. double-stranded III. without differentiation of axoneme and sheath IV. with differentiation of axoneme and sheath Choose the correct option
  •  Only I
  •  Only III
  •  I and II
  •  I and III
  (d) In prokaryotic cell, flagella, it present, are single stranded, and without differentiation of axoneme and sheath

Q6.   Which of the given statements are correct? I. Escherichia coli is a Gram (-) bacteria II. Bacillus subtilis is a Gram (+) bacteria III. Working of the Gram’s stain in Gram (-) bacteria is due to high lipid content of the cell wall, which gets dissolved in organic solvents like acetone Choose the correct option
  •  I and III
  •  II and III
  •  I and II
  •  I, II and III
(d) Escherichia coli is a Gram (-ve) bacteria. Bacillus subtilis is a Gram (+ve) bacteria. Washing of the Gram’s stain in Gram (-ve) bacteria is due to high lipid content of the cell wall, which gets dissolved in organic solvents like acetone

Q7.   DNA is denatured by
  •  Heat
  •  Acid
  •  DNA polymerase
  •  Both (a) and (b)
(d) Acid and heat both make DNA denatured.

Q8.   Assembly of two subunits 40 S and 60 S of the ribosome is
  •  100 S
  •  80 S
  •  70 S
  •  50 S
(b) The actual values of sedimentation coefficients of eukaryotic ribosomes are 79-80 S in fungi and 80 S in mammals. The sedimentation coefficients of two subunits is 40S (small) and 60S (large).

Q9.   A cell organelle that is exceptionally rich in hydrolytic enzymes is
  •  Ribosome
  •  Endoplasmic reticulum
  •  Lysosome
  •  Mitochondria
(c) Lysosomes are single membrane bound structures containing excess amount of hydrolytic enzymes. These are also known as ‘suicidal bags’ of the cell.

Q10.   Which of the following characteristic is correct about cell of plant cells?
  •  Plays role in protection
  •  Helps in cell-cell interaction
  •  Provides a barrier to undesirable macromolecules
  •  All of the above
(d) Cell wall performs a number of functions Cell wall not only gives shape to the cell and protects the cell from mechanical damage and infections, it also helps in cell to cell interaction and provides barrier to undesirable macromolecules

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Cell Biology Quiz-19
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