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Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life


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25 Questions MCQ Test General Science(Prelims) by IRS Divey Sethi | Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life for Class 9 2022 is part of General Science(Prelims) by IRS Divey Sethi preparation. The Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life questions and answers have been prepared according to the Class 9 exam syllabus.The Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life MCQs are made for Class 9 2022 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life below.
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Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 1

Match the following with the correct response.

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 1

Cell wall - Non living
Power house of cell - Mitochondria
Photosynthesis - Chloroplast
Protein synthesis - Ribosomes

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 2

Which of the following lacks nucleus-

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 2

Mature RBC lacks nucleus, hence RBC is called as red blood corpuscles.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 3

Which organelle releases energy?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 3

Mitochondria are called as power house of the cell because it contain enzymes for cellular respiration in which energy is released in form of ATP.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 4

Eukaryotic cells have 
A. Distinct nucleus
B. Nucleolus 
C. nuclear membrane  
D. Nucleoid

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 4 Eukaryotic cell contain a distinct nucleus,nucleolus which present inside the nucleus and a well nuclear membrane..
Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 5

“All cells arise from per existing cells” who said this?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 5

R. Virchow in 1855 presented the idea that all cells arise from pre-existing cells. This was modification in the earlier cell theory.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 6

Match the following with correct response.

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 6

Prokaryotes lack nucleus and thus they are called nucleoid. 
Eukaryotes contain nucleus and thus they are referred as complete cell. 
Viruses act both as living and non- living. 
Peroxisomes helps in removal of toxic substances.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 7

Animal cell lacking nuclei would also lack in

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 7

Animal cell that do not contain nuclei also lack in chromosome. As chromosome is present in the nucleus of the cell.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 8

What is the full form of ATP?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 8

The full form of ATP is adenosine tri phosphate. It is known as energy currency of the cell.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 9

The passage of water from a region of higher water concentration through a semi – permeable membrane to region of low water concentration is

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 9

The passage of water from a region of higher water concentration to lower concentration through a semi-permeable membrane is called osmosis.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 10

Which of the following is known as “physical basis of life”?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 10

Protoplasm is known as the physical basis of life in a cell because it comprises the living part of the cell including the cytoplasm, nucleus and other organelles and carries out all the processes necessary for life, like processing nutrients and oxygen, converting food into living matter, throwing out of used substances, producing new cells etc.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 11

Which of the following organelles is smallest in size?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 11

Ribosomes are primary site of protein synthesis or translation and measure 20 nm.
Lysosomes or "suicidal bags" of the cell measure 200 nm.
Mitochondria, the powerhouse of the cell are site of cellular respiration measures 3000 nm
Chloroplast is the site of photosynthesis and measures 5000 nm.
Therefore, ribosomes are smallest of all.
 

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 12

The number of chromosome present in frog is

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 12

There are 26 chromosomes in cells of frog. Chromosomes are present in nucleus of each cell. The transfer of traits takes place through chromosome.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 13

Which organelle is called power of house of the cell-

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 13

Mitochondria are called the power house of the cell because it contain enzyme for cellular respiration in which energy is released in form of ATP

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 14

Root hair absorbs water from soil through

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 14 A nucleus is often the largest organelle in a plant cell. It is enclosed by a double membrane called the nuclear envelope. A phospholipid layer that covers a cell's surface and acts as a barrier between the inside of a cell and the cell's environment.
Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 15

The term protoplasm was coined by

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 15

The term protoplasm was coined by J.E Purkinje. Protoplasm is the fluid medium in which different cell organelles are present.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 16

Match the following with correct response.

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 16

The correct option is Option C.
In 1831, while investigating the fertilization mechanisms of plants in the Orchidaceae and Asclepiadaceae families, he noted the existence of a structure within the cells of orchids, as well as many other plants, that he termed the “nucleus” of the cell.
Johann Evangelist Purkinje) (17 or 18 December 1787 – 28 July 1869) was a Czech anatomist and physiologist. In 1839, he coined the term 'protoplasm' for the fluid substance of a cell. He was one of the best known scientists of his time.
The cell was first discovered by Robert Hooke in 1665, which can be found to be described in his book Micrographia. In this book, he gave 60 'observations' in detail of various objects under a coarse, compound microscope. One observation was from very thin slices of bottle cork.
By the late 1830s, botanist Matthias Schleiden and zoologist Theodor Schwann were studying tissues and proposed the unified cell theory. The unified cell theory states that: all living things are composed of one or more cells; the cell is the basic unit of life; and new cells arise from existing cells.
 

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 17

Ribosomes are the centre for

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 17

Protein synthesis involve formation of amino acid chain according to information present on DNA. Ribosomes provide site for protein synthesis.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 18

Which of the following imparts colours to flower to attract insects for pollination?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 18

In plant cells, plastids are present that impart colours to the plant parts. Green colour is provided by chloroplast and other colour except white is imparted by chromoplas

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 19

Which organelle is called the suicide bag of the cell

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 19

Lysosome is called as the suicide bag of the cell as it contain enzymes for hydrolysis of all cell components in case of injury.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 20

Which of the following are the main constituents of cell wall?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 20

In the primary (growing) plant cell wall, the major carbohydrates are cellulose, hemicellulose and pectin. The cellulose microfibrils are linked via hemicellulosic tethers to form the cellulose-hemicellulose network, which is embedded in the pectin matrix.
 

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 21

Match the following with correct response.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 22

A cell has 10 chromosomes. After mitotic cell divisions the number of chromosomes in the daughter cell with be

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 22

After mitosis two identical cells are created with the same original number of chromosomes as the parent cell.
If the cell has 5 pairs of chromosomes, i.e., 10 chromosomes, then the two daughter cells produced will also have 10 chromosomes. This is because mitosis is an equational division. Hence, the chromosome number remains constant.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 23

Statement A: The secretary proteins are packed inside the secretory vesicles which are pinched off from the Golgi apparatus. 
Statement B : ER is absent in the red blood cells of mammals. 
Which of the two statement is true

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 23

The secretory proteins are packed inside the secretory vesicles which are formed by Golgi apparatus. Endoplasmic reticulum is absent in the red blood cells of mammals. So, both statements are correct.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 24

Which of the following acts as garbage disposal system of the cell?

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 24

Lysosomes present in the cytoplasm of cell contain very strong enzymes that can breakdown the all organic wastes produced in the cell. So, lysosome is called as garbage disposal system of the cell.

Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 25

The largest cell in the human body is

Detailed Solution for Lakhmir Singh & Manjit Kaur Test: The Fundamental Unit of Life - Question 25

The largest cell is ovum in the human body. The ovum also called egg cell is the reproductive cell in the female body. Ovum is 20 times bigger than the sperm cells and has a diameter of about 0.1 mm.

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