Here we are providing Class 9 Science Objective Chapter – 5 The Fundamental Unit of Life because its very important for Class 9 students as we all know that every board exam question has MCQs so that students should practice these questions so that students can get good marks in board. Class 9 Science Objective Chapter – 5 The Fundamental Unit of Life is an extremely important and its also a year in which students learn the fundamentals of concepts that help them lay a solid foundation for their higher education. Here we are providing in Class Class 9 Science Objective Chapter – 5 The Fundamental Unit of Life 100+ questions so that students practice more and more. If you want class wise Notes Then Click Here
Class 9 Science Objective Chapter – 5 The Fundamental Unit of Life
1. The process of plasmolysis in plant cell is defined as:
( A ) Breakdown of plasma membrane in hypotonic solution.
( B ) Shrinkage of cytoplasm in hypertonic medium.
( C ) Shrinkage of Nucleoplasm.
( D ) None of these
Ans – ( B )
2.Which of the following can be made into crystal?
( A ) A bacterium
( B ) An Amoeba
( C ) A virus
( D ) A sperm
Ans – ( C )
3. The proteins and lipids, essential for building the cell membrane, are manufactured by
( A ) rough endoplasmic reticulum
( B ) Golgi apparatus
( C ) plasma membrane
( D ) mitochondria
Ans – ( A )
4.Which of these options are not a function of ribosomes?
( A ) It helps in manufacture of protein molecules.
( B ) It helps in manufacture of enzymes.
( C ) It helps in manufacture of hormones.
( D ) It helps in manufacture of starch molecules.
( A ) ( A ) and (ii)
( B ) ( B ) and (iii)
( C ) ( C ) and (iv)
( D ) ( D ) and (i)
Ans – ( C )
5. Engulfing of food materials or foreign bodies by cells like Amoeba is called
( A ) diffusion
( B ) endocytosis
( C ) osmosis
( D ) plasmolysis
Ans – ( B )
6.Which of these is not related to endoplasmic reticulum?
( A ) It behaves as a transport channel for proteins between nucleus and cytoplasm.
( B ) It transports materials between various regions in the cytoplasm.
( C ) It can be the site of energy generation.
( D ) It can be the site for some biochemical activities of the cell.
Ans – ( C )
7. Animal cell lacking nuclei would also lack in
( A ) Endoplasmic reticulum
( B ) Chromosome
( C ) Lysosome
( D ) Ribosome
Ans – ( B )
8.Plasmolysis in a plant cell is defined as
( A ) breakdown (lysis) of plasma membrane in hypotonie medium
( B ) shrinkageof cytoplasm in hypertonic medium
( C ) shrinkage of nucleoplasm
( D ) none of them
Ans – ( B )
9. Middle lamella occurs:
( A ) Inner to primary wall
( B ) Inner to secondary wall
( C ) Outer to secondary wall
( D ) Outer to primary wall
Ans – ( D )
10.Which of the following are covered by a single membrane?
( A ) Mitochondria
( B ) Vacuole
( C ) Lysosome
( D ) Plastid
Ans – ( B )
11. A cell will swell up if
( A ) the concentration of water molecules in the cell is higher than the concentration of water molecules in surrounding medium
( B ) the concentration of water molecules in surrounding medium is higher than water molecules concentration in the cell
( C ) the concentration of water molecules is same in the cell and in the surrounding medium
( D ) concentration of water molecules does not matter
Ans – ( B )
12.The basic unit of life is:
( A ) tissue
( B ) cell
( C ) both
( D ) none of them
Ans – ( B )
13. Cell wall is absent in
( A ) Plants
( B ) Bacteria
( C ) Fungi
( D ) Mycoplasma
Ans – ( D )
14.The basic unit of life is:
( A ) tissue
( B ) cell
( C ) both
( D ) none of them
Ans – ( B )
15. Name two cell regions containing their own genetic material.
( A ) Mitochondria and Plastids
( B ) Lysosomes and ribosomes
( C ) Nucleus and mitochondria
( D ) Golgi apparatus and endoplasmic reticulum
Ans – ( A )
16.Who discovered the cell?
( A ) Robert Hooke
( B ) Leeuwenhoek
( C ) Robert Brown
( D ) T. Schwann
Ans – ( A )
17. Cartilage matrix is digested during its osteogenesis through:
( A ) Intracellular autophagic activity
( B ) Extracellular lysosomal activity
( C ) Intracellular heterophagic activity
( D ) Both B and C
Ans – ( C )
18.The cell wall of a plant cell is made up of:
( A ) glucose
( B ) fructose
( C ) protein
( D ) cellulose
Ans – ( D )
.
19. Nuclei were first discovered by
( A ) Strasburger
( B ) Fonatana
( C ) Robert Brown
( D ) Robert Koch
Ans – ( C )
20.Which of the following controls all biological activities of a cell?
( A ) Protoplasm
( B ) Cell wall
( C ) Nucleus
( D ) All of these
Ans – ( C )
21. Which of the following is not a function of golgi apparatus?
( A ) Detoxification of poisons and drugs
( B ) Storage and packaging of products
( C ) Formation of lysosomes
( D ) Production of complex sugars
Ans – ( A )
22.Which of the following is known as the ‘Power House’ of a cell?
( A ) Nucleus
( B ) Golgi Bodies
( C ) Ribosome
( D ) Mitochondria
Ans – ( D )
23. Ribosomes are the centre for
( A ) Respiration
( B ) Proteins synthesis
( C ) Photosynthesis
( D ) Fat synthesis
Ans – ( B )
24.Digestive Enzymes are found in:
( A ) Protoplasm
( B ) Cell wall
( C ) Lysosomes
( D ) Mitochondria
Ans – ( C )
25. Golgi apparatus takes part in synthesis of:
( A ) Glycolipids
( B ) Glycoproteins
( C ) Hormones
( D ) All the above
Ans – ( D )
26.Which is the longest cell of the human body?
( A ) Nerve cell
( B ) Liver cell
( C ) Kidney cell
( D ) Cardiac cell
Ans – ( A )
27. Name the plastid important for photosynthesis in plants.
( A ) Leucoplast
( B ) Chromoplast
( C ) Chloroplast
( D ) Cytoplast
Ans – ( C )
28.Chromosomes are made up of
( A ) DNA
( B ) Protein
( C ) DNA and protein
( D ) RNA
Ans – ( C )
29. In plant cells, many substances important for life are stored in
( A ) plastids
( B ) mitochondria
( C ) vacuoles
( D ) lysosomes
Ans – ( C )
30.Following are a few definitions of osmosis:
( A ) Movement of water molecules from a region of higher concentration to a region of lower concentration through a semi-permeable membrane.
( B ) Movement of solvent molecules from its higher concentration to lower concentration.
( C ) Movement of solvent molecules from higher concentration to lower concentration of solution through a permeable membrane.
( D ) Movement of solute molecules from lower concentration to higher concentration of solution through a semi permeable membrane.
Ans – ( A )
31. Which of the following is correct for prokaryotic ribosome:
( A ) It dissociates into 50S and 30S
( B ) It dissociates into 40S and 40S
( C ) It dissociates into 60S and 20S
( D ) It dissociates into 70S and 30S
Ans – ( A )
32.Find out the false sentence.
( A ) Nucleus is involved with the formation of lysosomes.
( B ) Nucleus, mitochondria and plastid have DNA, hence they are able to make their own structural proteins.
( C ) Mitochondria is said to be the power house of the cell as ATP is generated in them.
( D ) Cytoplasm is called as protoplasm.
Ans – ( A )
33. In a cell DNA is found in:
( A ) Nucleus, mitochondria and plastid
( B ) Nucleus, mitochondria and Golgi body
( C ) Mitochondria, Golgi body and plastid
( D ) Nucleus, Golgi body and plastid
Ans – ( A )
34. Basic unit of living body
( A ) Small room
( B ) Tissue
( C ) Hairs
( D ) Cell
Ans – ( D )
35. eRF1 is the release factor in eukaryotes that requires
( A ) ATP for its binding to ribosome
( B ) GTP for its binding to ribosome
( C ) ATP and GTP for its binding to ribosome
( D ) Mn2+for its binding to ribosome
Ans – ( B )
36. ………………. Is not unicellular organism
( A ) Cactus
( B ) Chlamydomonas
( C ) Paramecium
( D ) Bacteria
Ans – ( A )
37. The most abundant material in plant cell wall is
( A ) cellulose
( B ) lipids
( C ) proteins
( D ) wax
Ans – ( A )
38. ………………Is not multicellular organism
( A ) Human
( B ) Plant
( C ) Amoeba
( D ) Cactus
Ans – ( C )
39. Different layers of cell wall are:
( A ) Middle lamella and primary wall
( B ) Middle lamella, Primary wall and secondary wall
( C ) Primary wall and secondary wall
( D ) Wall layers exclude middle lamella
Ans – ( B )
40. Every multicellular organism has originated from………..
( A ) Human
( B ) Single cell
( C ) Bacteria
( D ) Tissue
Ans – ( B )
41. Which organelle is called the suicide bag of the cell
( A ) Golgi bodies
( B ) Centrosome
( C ) Chloroplast
( D ) Lysosome
Ans – ( D )
42. Which Out Of The Following Is Not A Function Of Vacuole?
( A ) Storage
( B ) Providing turgidity and rigidity to the cell
( C ) Waste excretion
( D ) Locomotion
Ans – ( B )
43. The primary function of smooth endoplasmic reticulum in liver cells is
( A ) protein synthesis
( B ) catabolism of proteins
( C ) detoxification
( D ) carbohydrate metabolism
Ans – ( C )
44. The Cell Organelle Involved In Forming Complex Sugars From Simple Sugars Are
( A ) Endoplasmic reticulum
( B ) Ribosomes
( C ) Plastids
( D ) Golgi apparatus
Ans – ( D )
45. What is the full form of ATP?
( A ) Adeno tri phosphate
( B ) Adeno tri phosphorus
( C ) Adenosine tetra phosphate
( D ) Adenosine tri phosphate
Ans – ( D )
46. Among the following statements which one is incorrect?
( A ) Golgi apparatus is involved with formation of lysosomes.
( B ) Nucleus, mitochondria and plastid have DNA, hence they are able to make their own structural proteins.
( C ) Lysosomes are called the suicide bags as they eat up their own cells.
( D ) Cytoplasm is called known as protoplasm.
Ans – ( D )
47. Which of the following acts as garbage disposal system of the cell?
( A ) Golgi body
( B ) Vacuole
( C ) Peroxisome
( D ) Lysosome
Ans – ( D )
48. Who proposed the “Black Reaction”?
( A ) Benda
( B ) Camillo Golgi
( C ) Schleiden
( D ) None of them
Ans – ( B )
49. Which organelle is called power of house of the cell-
( A ) Plastids
( B ) Mitochondria
( C ) Ribosomes
( D ) Golgi apparatus
Ans – ( B )
50. Which cell organelle plays a crucial role in detoxifring many poisons and drugs in a cell?
( A ) Golgi apparatus
( B ) Lysosomes
( C ) Smooth endoplasmic reticulum
( D ) Vacuoles
Ans – ( C )
51. Most of the substances in the living world are transported across the cell membrane by the process of
( A ) osmosis
( B ) endocytosis
( C ) diffusion
( D ) plasmolysis
Ans – ( A )
52. Which of the following are formed in bone marrow?
( A ) RBC
( B ) Cartilage cell
( C ) Blood platelets
( D ) Fibres
Ans – ( A )
53.Animal cell lacking nuclei would also lack in
( A ) Endoplasmic reticulum
( B ) Chromosome
( C ) Lysosome
( D ) Ribosome
Ans – ( B )
54. The undefined nuclear region of prokaryotes is also known as
( A ) nucleus
( B ) nucleolus
( C ) nucleic acid
( D ) nucleoid
Ans – ( D )
55. Find out the correct sentence.
( A ) Enzymes packed in lysosomes are made through RER
( B ) Rough endoplasmic reticulum and smooth endoplasmic reticulum produce lipid and protein respectively
( C ) Endoplasmic reticulum is related to the destruction of plasma membrane
( D ) Nucleoid is present inside the nucleoplasm of eukaryotic nucleus
Ans – ( A )
