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Cell Biology Quiz-21

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.  In plants, vacuole contains
  •  Soil
  •  Water and dissolved substance
  •   Cytoplasm
  •  All The above
Solution
In plants, the cytoplasm of mature cell, generally contain one large central vacuole. Vacuole are produced from invagination of cell membrane or ER. Cell sap is watery, non protoplasmic and contain dissolved substance in water (both organic and inorganic substance).

Q2. Cell membrane is made up of
  •  Protein
  •   Cellulose
  •   Lipids
  •   Lipids, carbohydrates and protein
Solution
Chemically, the plasma membrane or cell membrane is made up of approximately 60% protein and 40% lipids (by dry weight). The percentage of carbohydrates ranges from 1-10, which are in the form of glycoproteins or glycolipids.

Q3.   Which of the following are properties of reserved cells?
  •   They are differentiated and they have capacity of cell division
  •   They are undifferentiated and they do not have capacity of cell division
  •   They are differentiated and they do not have capacity of cell division
  •   They are undifferentiated and they have capacity of cell division
Solution
Reserved cells (quiescent cells) are undifferentiated and have the capacity of cell division.

Q4. Centrioles arise
  •  From pre-existing centrioles
  •   de novo
  •   From spherosome
  •   From nuclear envelope
Solution
Centrioles are capable of replication. Centriole replication is coordinated in animals cell with cell division. It occurs in 5 or G 2-phase

Q5. Vital stains are employed to study
  •   Living cells
  •   Frozen tissues
  •   Fresh tissues
  •   Preserved tissues
Solution
  Vital staining is the staining technique in which structure of living cells are stained either in Vivo or Vitro . Three most widely used stain for this are janus green B, neutral red and methylene blue.

Q6.  Ribosomal RNA (RNA) is synthesised in
  •  Nucleolus
  •  Nucleosome
  • Cytoplasm
  •  Ribosome
Solution
Nucleolus is one of the most important site of RNA synthesis. The RNA synthesised by it is RNA. Which comprises about 80% of total RNA content of the cell.

Q7. Difference between rough and smooth endoplasmic reticulum is that
  •   Rough has ribosomes
  •   Smooth has ribosomes
  •   Smooth takes part in protein synthesis
  •   Both has F - particles
Solution
On rough endoplasmic reticulum, the ribosomes are attached to the surface by ribophorin-I and ribophorin-II. The ribosomes are meant for protein synthesis.

Q8. Ribose sugar is present in
  •   RNA polymerase, RNA and ATP
  •  T RNA only
  •   RNA polymerase and ATP
  •   RNA and ATP
Solution
Both RNA and ATP contains five carbon sugar-ribose.

Q9. Chemical constituent of cystolith in plants is
  •   Calcium carbonate
  •   Calcium oxalate
  •   Calcium nitrate
  •   Calcium phosphate
Solution
Cystolith is a structure found in some plants., nettles, formed by an ingrowth of the cell wall and carrying grains of calcium carbonate at its tip.

Q10.  During DNA replication in prokaryotes, DNA is anchored to
  •   Chromosome
  •   Mesosome
  •   Nucleolus
  • Ribosome
Solution
On the plasma membrane of bacteria generally at mid point, there are present some circular coiled bodies called mesosomes. Mesosomes are more prominent in Gram+ve bacteria. Mesosomes receive DNA during conjugation and DNA replication enzyme.

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