In this section provides Biology Fundamental Unit of Life Class 9 MCQ (Cell) with Solutions for CBSE Class 9 to prepare the student for any eventuality and lays a strong foundation for higher level competitive exams like NTSE, NSO, KVPY, CBSE.
Fundamental Unit of Life Multiple Choice Questions with Solutions
1. Study of cells in all aspects is :
(A) Cytotaxonomy
(B) Cytology
(C) Cell biology
(D) Cytochemistry
Solution
Sol. Structure, function all related study of cell comes under cell Biology.
2. Which of the following statements concerning prokaryotes are true ?
(A) Because prokaryotes do not contain organelles they cannot photosynthesize or carry out cellular respiration
(B) Prokaryotes have no chromosomes and therefore like DNA
(C) Prokaryote flagella are similar in structure to eukaryote flagella
(D) None of the above
Solution
Sol. Prokaryotes are devoid of membrane bound cell organelles.
3. Organisms composed of many cells packed together are called :
(A) Unicellular
(B) Multicellular
(C) Both of these
(D) None of these
Solution
Sol. When many cells are formed together is known as multicellular.
4. Peptidoglycan is present in cell wall of :
(A) Plant
(B) Animal
(C) Bacteria
(D) Algae
Solution
Sol. Bacterial cell wall has peptidoglycan polymers.
5. Plant cells can usually be distinguished from animal cells because only plant cells possess :
(A) Mitochondria and lysosomes
(B) Chromosomes and lysosomes
(C) Chloroplast and cell wall
(D) Chloroplast and Golgi complex
Solution
Sol. Cell wall & chloroplast are found only in plant cell.
6. Fluid mosaic model of cell membrane describes :
(A) Mosaic model of all membranes
(B) Semifluid model smeared in unit membrane.
(C) Bilayer lipid model
(D)Protein phospho- lipid bilayer cell structure with mobility.
Solution
Sol. The lipid bilayer shows different kinds of movements of lipid molecules.
7. What is the characterstick of Metacentric chromosome ?
(A) Centromere is slightly away from teh middle point
(B) Centromere is near the middle point
(C) Centromere is near the end
(D) Centromere is at the tip of the chromosome
Solution
Sol. In Metacentric chromosome, centromere is near the middle and the two arms are almost equal in length.
8. The most widely distributed component in a cell is :
(A) Chromoplast
(B) Chloroplast
(C) RNA
(D) DNA
Solution
Sol. RNA is distributed throughout the cell.
9. Bacterial wall contains :
(A) Cellulose
(B) Peptidoglycan
(C) Murein
(D) Both (B) and (C)
Solution
Sol. Peptidoglycan & Murein both are present in bacterial cell wall.
10. Ripe fruits soften due to :
(A) Degeneration of cell walls
(B) Partial solubilisation of pectic compounds
(C) Metabolism of tannins
(D) Exosmosis
Solution
Sol. Pectin is hard but due to its solubilasation fruits become soft.
11. Which of the following is not a part of the ‘cell theory‘ :
(A) All organisms are formed of cells.
(B) Cells are the smallest units of structure and function.
(C) All cells arise from pre-existing cells by cell division.
(D) Cells are physiological units of living beings
Solution
Sol. Cell theory states that cells are fundamental units of plants & animals Rudolf Virchow expanded to give “new cells arise from pre existing cells”.
12. The shape of stomata’s guard cell is :
(A) Irregular
(B) Bean shaped
(C) Fibrous
(D) Elongated
Solution
Sol. The guard cells are bean shaped and the opening present between these two cells is known as stoma.
13. Longest animal cell is :
(A) Sperm cell
(B) Nerve cell
(C) Striated muscle cell
(D) Ostrich egg
Solution
Sol. The nerve cells are the longest animal cell (may be upto 1m).
14. Cheek cells are made up of :
(A) Muscle cells
(B) Epithelial cells
(C) Nerve cells
(D) Brain cells
Solution
Sol. Different types of cells are found, the cell forming lining of organelles are epithelial and cheek cells are a type of epithelial cell.
15. The cells discovered in thin sections of cork by Robert Hooke were actually:
(A) Cell walls
(B) Cellulose
(C) Protoplasm
(D) Nuclei
Solution
Sol. Robert Hooke actually observed dead cork cells which were empty and thus he could visualize only cell wall.
16. Cell doctrine was proposed by :
(A) Schleiden and schwann
(B) Watson and crick
(C) Schleiden, Schwann and Rudolf virchow
(D) Davson and Danielli
Solution
Sol. Cell theory states that cells are fundamental units of plants & animals, Rudolf Virchow expanded to give “new cells arise from pre existing cells”.
17. The book ‘Micrographia’ is written by :
(A) Robert brown
(B) M.J. Schleiden
(C) Robert hooke
(D) None of these
Solution
Sol. The book ‘Micrographia’ was written by Robert Hooke.
18. The size of cell depends on :
(A) The nucleo-cytoplasmic ratio
(B) The ratio of the cell surface to the cell
(C) The rate of metabolism
(D) All of the above
Solution
Sol. Smaller cells have high metabolic activity, surface area per unit volume and also nucleo-cytoplasmic ratio. So size of cell determines activity.
19. Which of the following kind of lipids are most abundant in the cell membrane?
(A) Phospholipids
(B) Glycolipids
(C) Cholesterol
(D) Cerebroside
Solution
Sol. The plasma membrane has mostly phospholipids.
20. The statement of the cell theory that was discarded by Rudolf Virchow was:
(A) Omnis cellula e cellula
(B) Cells arise de novo
(C) Cell is the basic unit of life
(D) All of these
Solution
Sol. Cell theory states that cells are fundamental units of plants & animals, Rudolf Virchow expanded to give “new cells arise from pre existing cells”.
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