Students are encouraged to practice the Class 9 Science MCQ Questions of The Fundamental Unit of Life with Answers is accessible here. On the latest Exam Pattern all MCQ Questions with Answers had preoared . Students can settle these MCQ Questions for class 9 Science with Answers and survey their preparation level.
Every one of these questions will help you reconsider the significant subjects and Concepts for the Multiple-choice questions. That will show up in the Class 9 Science paper under the CBSE Annual Exam. Addressing The Fundamental Unit of Life Multiple Choice Questions of Class 9 Science can be of extreme assistance as you will know about every one of the concepts.
These MCQ Questions of The Fundamental Unit of Life helps for a speedy correction of the Chapter. Subsequently assisting you with upgrading subject information. Have a look at the MCQ Questions for Class 9 Science and cross-check your answers during the exam preparation.
Practice MCQ Questions for class 9 Chapter-Wise
- Which of the following can be made into crystal?
(a) A bacterium
(b) An Amoeba
(c) A virus
(d) A sperm
- Chromosomes are made up of
(a) DNA
(b) Protein
(c) DNA and protein
(d) RNA
- Which cell organelle plays a crucial role in detoxifying many poisons and drugs in a cell?
(a) Golgi apparatus
(b) Lysosomes
(c) Smooth endoplasmic reticulum
(d) Vacuoles
- The undefined nuclear region of prokaryotes is also known as
(a) nucleus
(b) nucleolus
(c) nucleic acid
(d) nucleoid
- Amoeba acquires its food through a process, termed
(a) exocytosis
(b) endocytosis
(c) plasmolysis
(d) exocytosis and endocytosis both
- The process by which water moves through a semi-permeable membrane from a region of high concentration to a region of lower concentration, thereby equalizing water concentration is called:
(a) Evaporation
(b) Diffusion
(c) Osmosis
(d) All of the above
- You must have observed that a fruit when unripe is green but it becomes beautifully coloured when ripe. According to you what is the reason behind this colour change?
(a) Chloroplasts change to chromosplasts
(b) Chromosplasts change to chromosomes
(c) Chloroplasts change to chromosomes
(d) Chromosplasts change to chloroplasts
- The process of plasmolysis in a plant cell is defined as:
(a) Breakdown of the plasma membrane in hypotonic solution.
(b) Shrinkage of cytoplasm in hypertonic medium
(c) Shrinkage of Nucleoplasm.
(d) None of these
- Cell wall is absent in
(a) Plants
(b) Bacteria
(c) Fungi
(d) Mycoplasma
- 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
- Animal cell lacking nuclei would also lack in
(a) Endoplasmic reticulum
(b) Chromosome
(c) Lysosome
(d) Ribosome
- The most abundant material in the plant cell wall is
(a) cellulose
(b) lipids
(c) proteins
(d) wax
- Lysosome arises from
(a) endoplasmic reticulum
(b) golgi apparatus
(c) nucleus
(d) mitochondria
- Cell theory was given by
(a) Schleiden and Schwann
(b) Virchow
(c) Hooke
(d) Haeckel
- Silver nitrate solution is used to study
(a) endoplasmic reticulum
(b) golgi apparatus
(c) nucleus
(d) mitochondria
- The cell will stay the same size…………………. Solution
(a) Hypertonic solution
(b) Hypotonic solution
(c) Isotonic solution
(d) None of them
- Rod-shaped structure present in the nucleus called………….
(a) Cytoplasm
(b) Vacuole
(c) Proteins
(d) Chromosomes
- Functional segments of DNA called …………
(a) RNA
(b) Genes
(c) Chromosome
(d) None of them
- White or colorless plastids known as……………
(a) Plasmodium
(b) Plastid
(c) Chloroplast
(d) Leucoplast
- The process of cell division by which most of the cells are divided for growth is called………….
(a) Reproduction
(b) Meiosis
(c) Mitosis
(d) None of them
Answer
- Answer:(c) A virus
Explanation: ‘A Virus’. Viruses are considered as the intermediates between living and non- living as they cannot metabolize or reproduce on their own. For all its processes virus requires a host. Viruses can be stored as crystal-like chemicals.
- Answer:(c) DNA and protein
Explanation: Each chromosome is made up of two components (i) Deoxyribonucleic acid (DNA) (ii) Proteins (e.g.; his tones and acidic proteins) These consist of two (unreplicated) or four (duplicated) arms and a primary constriction or centromere which gives them a particular shape due to its position.
- Answer:(c) Smooth endoplasmic reticulum
Explanation: Smooth endoplasmic reticulum(ER) is responsible for the detoxification of a number of organic chemicals.
- Answer:(d) nucleoid
Explanation: The nucleoid (meaning nucleus-like) is an irregularly shaped region within the prokaryotic cell that contains all or most of the genetic material.
- Answer:(b) endocytosis
Explanation: Amoeba is an unicellular organism. It shows the holozoic mode of nutrition where it engulfs the whole food and digests it using various digestive enzymes. This method of engulfing the food molecule is called endocytosis or phagocytosis.
- Answer:(c) Osmosis
Explanation: Osmosis is the movement of water molecules from a solution with a high concentration of water molecules to a solution with a lower concentration of water molecules, through a cell’s partially permeable membrane.
- Answer: (a) Chloroplasts change to chromosplasts
Explanation: The change in color of the fruits on ripening is a chemical change. … An unripe fruit is green because it contains chloroplasts in its skin. Towards the ripening of the fruit, the chloroplasts are changed into chromoplasts which gives the fruit attractive non-green colour.
- Answer: (b) Shrinkage of cytoplasm in hypertonic medium.
Explanation: Plasmolysis is the process of shrinkage or contraction of the protoplasm of a plant cell as a result of loss of water from the cell. Plasmolysis is one of the results of osmosis and occurs very rarely in nature, but it happens in some extreme conditions.
9. Answer: (d) Mycoplasma
Explanation: Mycoplasma (Kingdom-Monera) are the simplest and smallest free living prokaryotes which are devoid of a cell wall. Plasma membrane forms the outer boundary of the cell of mycoplasma. Nostoc is a cyanobacterium (Kingdom- Monera), in which cell wall comprises of peptidoglycans.
- Answer:(a) Mitochondria and Plastids
Explanation: Chloroplast and mitochondria are the double membranous cell organelle. These two cell organelle, are the only one which contains their own genetic component that is the DNA.
- Answer:(b) Chromosome
Explanation: An Animal cell lacking nuclei would also lack in chromosomes. The cells which lack chromosomes are Red blood cells and platelets. Chromosomes occur during cell division, and they are formed due to the coiling and folding of chromatin. If any animal cell lacks a nucleus then it will lack of chromosomes too.
12. Answer: (a) cellulose
Explanation: The cell wall is composed of cellulose, the most abundant and resistant polysaccharide on earth.
- Answer:(b) golgi apparatus
Explanation: lysosomes which arise from the Golgi apparatus. Together with the Golgi apparatus, the endoplasmic reticulum is called the cell’s protein machinery. Likewise, the lysosome proteins from the Golgi apparatus are marked and bundled with the late endosome in a specific vesicle to create a mature lysosome.
- Answer: (a) Schleiden and Schwann
Explanation: The classical cell theory was proposed by Theodor Schwann in 1839.These parts were based on a conclusion made by Schwann and Matthias Schleiden in 1838, after comparing their observations of plant and animal cells.
- Answer:(b) golgi apparatus
Explanation: Silver nitrate solution is used for studying the Golgi Apparatus. Golgi apparatus is an organelle that is present in eukaryotic cells which consists of a stack of flattened sacs.
- Answer:(c) Isotonic solution
Explanation: If a cell is placed in an isotonic solution, there will be no net flow of water into or out of the cell, and the cell’s volume will remain stable. If the solute concentration outside the cell is the same as inside the cell, and the solutes cannot cross the membrane, then that solution is isotonic to the cell.
- Answer:(d) Chromosomes
Explanation: The rod-shaped structures in the cell nucleus that contain genes are called chromosomes.
- Answer:(b) Genes
Explanation: Genes are the functional segments of DNA as they are capable of producing mRNA.
- Answer:(d) Leucoplast
Explanation: Leucoplasts: colorless plastids for monoterpene synthesis; leucoplasts sometimes differentiate into more specialized plastids: Amyloplasts: for starch storage and detecting gravity (for geotropism).
- Answer:(c) Mitosis
Explanation: Most of the time when people refer to “cell division,” they mean mitosis, the process of making new body cells. Mitosis is a fundamental process for life. During mitosis, a cell duplicates all of its contents, including its chromosomes, and splits to form two identical daughter cells.
Click here to more Practice MCQ Questions of Fundamental Unit of Life