Cell Biology Quiz-17

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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.   Plasmodesmata connections helps in
  •  Cytoplasmic streaming
  •  Synchronous mitotic divisions
  •  Locomotion of unicellular organisms
  •  Movement of substances between cells
(d) Plasmodesmata (singular-plasmodesma) are cytoplasmic bridges between adjacent plant cells. Various substances can pass from one cell to another through plasmodesmata. This term is given by Strasburger in 1901.

Q2.   Which of the following subunits of ribosome is composed of 23 S rRNA and a 5 S mRNA + 32 different proteins?
  •  50S
  •  70S
  •  30S
  •  60S
(b) 50 S subunit of 70 S ribosome is composed of 23S rRNA and 5 S mRNA +32 different proteins.

Q3.   DNA multiplication is called
  •  Translation
  •  Replication
  •  Transduction
  •  Transcription
(b) DNA multiplication or duplication of DNA takes place by replication. It takes place during S-phase of interphase in cell-cycle.
Q4.   Lipid bilayer is present in
  •  Plasma membrane
  •  Ribosome
  •  Chromosome
  •  Nucleolus
(a) As per fluid mosaic model of plasma membrane, the cell membrane consists of a highly viscous fluid matrix of two layers phospholipid molecules. Ribosome mainly consists of rRNA and protein. Chromosome is made up of DNA and basic proteins, whereas nucleolus mainly consists of rRNA.

Q5.   Cytoskeleton is made up of
  •  Calcium carbonate granules
  •  Callose deposits
  •  Cellulosic microfibrils
  •  Proteinaceous filaments
  (d) The cytoplasm of all eukaryotic cells is criss-crossed by a network of protein fibres that support the shape of the cell and anchor organelles to fixed locations. It is a dynamic system with three types of fibres – actin filaments, microtubule and intermediate filament.

Q6.   The two subunits of ribosome remain united at a critical ion level of
  •  Copper
  •  Manganese
  •  Magnesium
  •  Calcium
(c) Magnesium is required in united ribosomal subunits, in leaves, growing areas of root and stem protein synthesis hence, withdrawn from ageing.

Q7.   The Golgi apparatus
  •  Is found only in animals
  •  Is found in prokaryotes
  •  Is a site of rapid ATP production
  •  Modifies and packages proteins
(d) The Golgi complex functions primarily as a processing plant where proteins newly synthesized in endoplasmic reticulum are modified in specific ways. It is primarily associted with secretory activities of the cell.

Q8.   Plasma membrane helps in
  •  Transportation of only water in and out of cell
  •  Protein synthesis
  •  Osmoregulation
  •  Nucleic acid synthesis
(c) All cells are enclosed by a thin, film-like liable membrane called the plasma membrane or plasmalemma. The main function of plasma membrane is to regulate the flow of materials into and out of the cell (osmoregulation). The membrane is selectively permeable.

Q9.   Golgi apparatus I. transports and modifies material. II. Secrete mucin in respiratory tract. III. Secretes slime in insectivorous plants What is correct?
  •  I is incorrect, but II and III are correct
  •  II is incorrect, but I and III are correct
  •  II and III are incorrect but I is correct
  •  None incorrect all correct
(d) All the given statements regarding Golgi apparatus are true.

Q10.   Arrange the following cells in an ascending order of their size and select the correct option I. Ostrich eggs II. Mycoplasma III. Bacteria IV. Human RBCs
  •  II→III→IV→I
  •  I→IV→III→II
  •  II→I→IV→III
  •  I→II→IV→III
(a) (i) Ostrich egg – 170 ×150 μm (ii) Mycoplasma – 01 – 0.5 μm (iii) Bacteria – 3 - 5 μm (iv) Human RBCs – 7 μm So, the arrangement in ascending order is Mycoplasma → Bacteria → Human RBCs → Ostrich egg

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Cell Biology Quiz-17
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