cell biology Quiz-30
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. Ribosomes may also be called
Solution
(c) Ribosome is small dense rounded cell organelle clouds, separated as a fraction by ultracentrifugation and named it as microsome. In fact, microsomes refer to particles, which get separated from ER. It was rich in ribosomes. On the basis of chemical nature they are described as ribonucleoprotien particles or RNP particles.
(c) Ribosome is small dense rounded cell organelle clouds, separated as a fraction by ultracentrifugation and named it as microsome. In fact, microsomes refer to particles, which get separated from ER. It was rich in ribosomes. On the basis of chemical nature they are described as ribonucleoprotien particles or RNP particles.
Q2. …… are an exception to cell theory
Solution
(c) Viruses are an exception to cell theory. Viruses are acellular and do not have a cellular machinery. Even then they are considered to be organisms
(c) Viruses are an exception to cell theory. Viruses are acellular and do not have a cellular machinery. Even then they are considered to be organisms
Q3. Which one is single membrane cell organelle?
Solution
(c) Single membrane cell organelles are known as microbodies eg., lysosomes, peroxisomes, glyoxysomes and spherosomes.
(c) Single membrane cell organelles are known as microbodies eg., lysosomes, peroxisomes, glyoxysomes and spherosomes.
Q4. In eukaryotic cell, thylakoids, if present,
Solution
(a) In eukaryotic cells, thylakoids, it present, are grouped inside the chloroplasts instead of floating freely in cytoplasm
(a) In eukaryotic cells, thylakoids, it present, are grouped inside the chloroplasts instead of floating freely in cytoplasm
Q5. Membrane that covers the vacuole in a plant cell is called
Solution
(a) Tonoplast is the membrane that bounds the vacuole of the plant cell.
(a) Tonoplast is the membrane that bounds the vacuole of the plant cell.
Q6. Schwann proposed a cell theory according to which
Solution
(c) Schwann defined a cell as a membrane enlocked, nucleus containing structure. He also proposed a cell hypothesis (Schwann; 1838) that bodies of animals and plants are made up of cells and their products
(c) Schwann defined a cell as a membrane enlocked, nucleus containing structure. He also proposed a cell hypothesis (Schwann; 1838) that bodies of animals and plants are made up of cells and their products
Q7. The four basic shapes of bacteria are
Solution
(c) Prokaryotic cells may vary greatly in shape and size. The four basic shapes of bacteria are bacillus (rod-like), coccus (spherical), vibrio (Comma shaped) and spirillum (spiral)
(c) Prokaryotic cells may vary greatly in shape and size. The four basic shapes of bacteria are bacillus (rod-like), coccus (spherical), vibrio (Comma shaped) and spirillum (spiral)
Q8. The chemical substances found most abundantly on the middle lamella are released into the phragmoplast by
Solution
(b) The chemical substances found most abundantly in the middle lamella are released into the phragmoplast by Golgi complex. The Golgi complex synthesises polysaccharides which bring about formation of a cell plate between daughter nuclei during cytokinesis.
(b) The chemical substances found most abundantly in the middle lamella are released into the phragmoplast by Golgi complex. The Golgi complex synthesises polysaccharides which bring about formation of a cell plate between daughter nuclei during cytokinesis.
Q9. Which one of the following remains absent in prokaryotes?
Solution
(a) Prokaryotes (bacteria and blue-green algae) are the most abundant organisms on earth. A prokaryotic cell does not contain a membrane-bound nucleus. Each prokaryotic cell is surrounded by plasma membrane. There is no subcellular organelles, only infolding of the plasma membrane called mesosomes and ribosomes are present.
(a) Prokaryotes (bacteria and blue-green algae) are the most abundant organisms on earth. A prokaryotic cell does not contain a membrane-bound nucleus. Each prokaryotic cell is surrounded by plasma membrane. There is no subcellular organelles, only infolding of the plasma membrane called mesosomes and ribosomes are present.
Q10. In eubacteria, a celluler component that resembles eukaryotic cells is
Solution
(d) The plasma membrane of eubacteria resembles to that of eukaryotic cell. It is made of phospholipid, protein and some amount of polysaccharides. However, it lacks sterol, the characteristic of eukaryotic cell membrane. Instead, there is sterol like hopanoid.
(d) The plasma membrane of eubacteria resembles to that of eukaryotic cell. It is made of phospholipid, protein and some amount of polysaccharides. However, it lacks sterol, the characteristic of eukaryotic cell membrane. Instead, there is sterol like hopanoid.
