Every question from this NCERT chapter, with a detailed explanation.
With reference to Plastids, consider the following statements: 1. They are present only in plant cells. 2. Chromoplasts are colourless plastids, while leucoplasts contain chlorophyll. 3. Unlike mitochondria, plastids lack their own DNA and ribosomes. Which of the statements given above is/are correct?
Which of the following pairs is correctly matched?
Consider the following statements about Vacuoles: 1. They are small-sized in animal cells while plant cells have very large vacuoles. 2. In Amoeba, the food vacuole is absent. 3. They can play a role in expelling excess water from the cell. Which of the statements given above is/are correct?
With reference to osmosis, consider the following statements: 1. Osmosis is the net diffusion of water across a selectively permeable membrane. 2. If a cell is placed in a hypotonic solution, it is likely to shrink. 3. Water molecules pass across the membrane in only one direction during osmosis. Which of the statements given above is/are correct?
A plant cell is placed in a hypertonic solution. Which of the following phenomena is most likely to occur?
Consider the following statements regarding the cell wall: 1. It is present in plants, fungi, and bacteria. 2. It is mainly composed of lipids which provide structural strength. 3. It enables cells to withstand very dilute external media without bursting. Which of the statements given above is/are correct?
Match List I with List II and select the correct answer using the code given below: List I | List II A. Ribosomes | 1. Waste disposal system B. SER | 2. Formation of complex sugars from simple sugars C. Lysosomes | 3. Detoxification of poisons D. Golgi Apparatus | 4. Sites of protein manufacture
Consider the following statements about the Cell Theory: 1. It was presented by two biologists, Schleiden and Schwann. 2. It states that the virus is the basic unit of life. 3. It was expanded to include the concept that all cells arise from pre-existing cells. Which of the statements given above is/are correct?
When a deshelled egg is placed in a concentrated salt solution for a short duration, which one of the following changes is observed?
Which one of the following represents the correct sequence of events in the synthesis and transport of proteins in a cell?
Consider the following statements regarding the composition of the Cell Wall: 1. In plants, it is composed mainly of protein. 2. It is a non-living rigid structure outside the plasma membrane. 3. It provides structural strength to plants. Which of the statements given above is/are correct?
Which one of the following best explains why a plant cell does not burst when placed in a hypotonic solution?
In plant cells, which one of the following organelles contains the pigment chlorophyll?
With reference to the structure of the Nucleus, what is the function of the nuclear pores?
Consider the following statements regarding "ATP": 1. It is known as the energy currency of the cell. 2. It is produced in the ribosomes. 3. The body cannot use the energy stored in ATP for mechanical work. Which of the statements given above is/are correct?
With reference to cellular transport mechanisms, what is the primary distinction between Osmosis and Diffusion?
Consider the following statements about Unicellular organisms: 1. A single cell constitutes the whole organism. 2. Examples include fungi like mushrooms and multicellular algae. 3. They perform all necessary life functions within a single cell. Which of the statements given above is/are correct?
Which of the following statements best describes the "Black Reaction" developed by Camillo Golgi?
In the context of cell organelles, what is the significance of "membrane-bound" structures in eukaryotic cells?
Consider the following statements regarding the Smooth Endoplasmic Reticulum (SER): 1. It has ribosomes attached to its surface. 2. It is involved in the synthesis of fat molecules or lipids. 3. It helps in building the cell membrane through lipid synthesis. Which of the statements given above is/are correct?
In the context of cell division, which one of the following changes occurs in the chromatin material?
Consider the following statements regarding "Endocytosis": 1. It is the process by which a cell expels undigested waste into the external environment. 2. It is enabled by the flexibility of the cell membrane. 3. It allows the cell to engulf food and other material from the external environment. Which of the statements given above is/are correct?
The process of "diffusion" plays a crucial role in cellular activities. Which one of the following statements is correct regarding diffusion in cells?
Which of the following statements is correct regarding the DNA molecules in a cell?
Which of the following best explains the concept of "division of labour" within a single cell?
Consider the following statements regarding the plasma membrane: 1. It is the outermost covering in all living organisms including plants. 2. It allows or permits the entry and exit of some materials in and out of the cell. 3. It is flexible and made up of organic molecules called lipids and proteins. Which of the statements given above is/are correct?
Which one of the following processes enables an Amoeba to acquire its food from the external environment?
With reference to the nucleus of a cell, consider the following statements: 1. The nuclear membrane is impermeable and lacks pores. 2. Chromosomes become visible as rod-shaped structures only when the cell is about to divide. 3. Chromosomes are composed of DNA and protein. Which of the statements given above is/are correct?
What is the primary difference between chromatin material and chromosomes?
Consider the following statements regarding Prokaryotic cells: 1. They lack a nuclear membrane. 2. Their nuclear region is well-defined and known as the nucleus. 3. They possess membrane-bound cell organelles like mitochondria. Which of the statements given above is/are correct?
With reference to the Endoplasmic Reticulum (ER), consider the following statements: 1. Rough Endoplasmic Reticulum (RER) appears rough due to the presence of ribosomes. 2. Smooth Endoplasmic Reticulum (SER) is primarily involved in the synthesis of proteins. 3. SER plays a crucial role in detoxifying poisons in the liver cells of vertebrates. Which of the statements given above are correct?
The process known as "Membrane Biogenesis" involves:
Which of the following organelles is primarily involved in the storage, modification, and packaging of products in vesicles?
Consider the following statements regarding Lysosomes: 1. They are formed directly by the mitochondria. 2. They contain digestive enzymes made by the Rough Endoplasmic Reticulum (RER). 3. They are capable of digesting the cell's own organelles if the cell gets damaged. Which of the statements given above is/are correct?
Which one of the following features distinguishes Mitochondria from most other cell organelles?
With reference to Cell Division, consider the following statements: 1. Mitosis results in two daughter cells with half the number of chromosomes as the mother cell. 2. Meiosis results in four new cells with half the number of chromosomes. 3. Mitosis is primarily for growth and repair, while meiosis is for gamete formation. Which of the statements given above is/are correct?
Which one of the following is NOT a function of the Endoplasmic Reticulum?
Consider the following statements regarding the structure of Mitochondria: 1. It has two membrane coverings instead of just one. 2. The inner membrane is smooth and lacks any folds. 3. The outer membrane is impermeable and non-porous. Which of the statements given above is/are correct?
In plant biology, the phenomenon of "Plasmolysis" refers to:
Which one of the following statements correctly defines a "Hypertonic" solution relative to a cell?
Consider the following statements about Leucoplasts: 1. They are primarily organelles for storage. 2. They contain only chlorophyll and no other materials. 3. They are green in colour due to chlorophyll. Which of the statements given above is/are correct?
Which of the following statements is correct regarding the formation of Lysosomes?
With reference to Cell Division, which of the following statements distinguishes Meiosis from Mitosis?
Consider the following statements regarding the Cytoplasm: 1. It is the fluid content inside the plasma membrane. 2. It is devoid of any cell organelles. 3. In prokaryotes, it lacks membrane-bound cell organelles. Which of the statements given above is/are correct?
Which one of the following is a characteristic feature of Prokaryotic cells?
Why are Lysosomes often referred to as the "suicide bags" of a cell?
Consider the following statements about the Golgi Apparatus: 1. It consists of a single large vesicle without any stacks. 2. Its membranes often have connections with the membranes of the Endoplasmic Reticulum. 3. It is involved in the formation of lysosomes. Which of the statements given above is/are correct?
Which of the following is correct regarding the "Stroma"?
Match List I with List II and select the correct answer using the code given below: List I | List II A. Hypotonic | 1. Cell swells B. Isotonic | 2. Cell stays the same size C. Hypertonic | 3. Shrinkage of protoplasm D. Plasmolysis | 4. Cell shrinks
Which of the following organelles is involved in the formation of complex sugars from simple sugars?
With reference to the cell wall, "Plasmolysis" occurs when:
Consider the following statements about Ribosomes: 1. They are non-membrane-bound organelles. 2. They are present in eukaryotic cells only. 3. They are the sites of protein manufacture. Which of the statements given above is/are correct?
Which of the following is a function of the Central Vacuole in plant cells?
Which of the following statements is correct regarding the "Nucleoid"?
Consider the following statements regarding the transport of substances in a cell: 1. CO2 moves out of the cell by diffusion when its concentration inside is lower than outside. 2. Water obeys the law of diffusion. 3. Movement of Oxygen into the cell occurs without the expenditure of energy. Which of the statements given above is/are correct?
Which of the following pairs is correctly matched?
Which one of the following best explains the "selectively permeable" nature of the cell membrane?
What enables plant cells to withstand greater changes in the surrounding medium compared to animal cells?
What is the function of the "Cristae" (folds) in Mitochondria?
Consider the following statements regarding "Mitosis": 1. It is the process by which most cells divide for growth. 2. The mother cell divides to form four identical daughter cells. 3. It results in the retention of the same chromosome number in daughter cells. Which of the statements given above is/are correct?
Which of the following organelles are known to have their own genetic material? 1. Mitochondria 2. Ribosomes 3. Golgi apparatus 4. Plastids Select the correct answer using the code given below:
In the context of cellular transport, what is the result if a cell is placed in an "Isotonic" solution?
Which of the following statements is correct regarding the "Nuclear Membrane"?
Consider the following statements about "Meiosis": 1. It involves a single division of the nucleus. 2. It produces four new cells. 3. It is involved in the formation of gametes. Which of the statements given above are correct?
Match List I with List II and select the correct answer using the code given below: List I | List II A. Robert Hooke | 1. Coined 'Protoplasm' B. Leeuwenhoek | 2. Discovered Nucleus C. Robert Brown | 3. Discovered Cells (Cork) D. Purkinje | 4. Discovered free-living cells
Consider the following statements regarding "Vacuoles" in plant cells: 1. They can occupy 50-90% of the cell volume. 2. They store only waste products and never nutrients like amino acids. 3. They are always absent in young plant cells. Which of the statements given above is/are correct?
Which of the following best describes the role of the Endoplasmic Reticulum (ER) as a "cytoplasmic framework"?
Which one of the following is not a component of the Cell Theory as understood today?