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Life Process testing - Class 10 MCQ


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5 Questions MCQ Test - Life Process testing

Life Process testing for Class 10 2024 is part of Class 10 preparation. The Life Process testing questions and answers have been prepared according to the Class 10 exam syllabus.The Life Process testing MCQs are made for Class 10 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises, MCQs and online tests for Life Process testing below.
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Life Process testing - Question 1

Which of the following are energy foods?

Detailed Solution for Life Process testing - Question 1
Energy Foods:
Carbohydrates and fats are considered energy foods because they provide the body with fuel for energy production. When broken down during digestion, carbohydrates and fats release energy that can be used by the body for various functions. Here is a detailed explanation of why carbohydrates and fats are energy foods:
Carbohydrates:
- Carbohydrates are the body's primary source of energy.
- They are broken down into glucose, which is used by the body's cells to produce energy.
- Good sources of carbohydrates include fruits, vegetables, whole grains, and legumes.
Fats:
- Fats are a concentrated source of energy.
- They provide more than twice the amount of energy per gram compared to carbohydrates and proteins.
- Fats are essential for the absorption of fat-soluble vitamins and the production of hormones.
- Good sources of healthy fats include avocados, nuts, seeds, and olive oil.
It is important to note that while proteins, vitamins, minerals, water, and roughage are essential for overall health and well-being, they are not primarily considered energy foods. Proteins are mainly responsible for building and repairing tissues, while vitamins and minerals play a vital role in various bodily functions. Water is crucial for hydration, and roughage aids in digestion and bowel health. However, when it comes to providing energy, carbohydrates and fats are the primary sources.
Life Process testing - Question 2

In which mode of nutrition an organism de-rives its food from the body of another living organism without killing it?

Detailed Solution for Life Process testing - Question 2
Parasitic nutrition
Parasitic nutrition is the mode of nutrition in which an organism derives its food from the body of another living organism without killing it. The organism that benefits is called a parasite, while the organism being harmed is called the host. Here is a detailed explanation of parasitic nutrition:
1. Definition: Parasitic nutrition is a type of heterotrophic nutrition where the parasite obtains its nutrients from the host organism without causing immediate death.
2. Relationship: The parasite and the host have a close relationship, where the parasite benefits at the expense of the host. The parasite relies on the host for its survival and reproduction.
3. Feeding Mechanism: Parasites have specialized structures or organs that allow them to attach to the host and obtain nutrients. Examples include suckers, hooks, or specialized mouthparts.
4. Types of Parasites: There are different types of parasites based on their location and relationship with the host. Some parasites live on the surface of the host (ectoparasites), while others live inside the host's body (endoparasites).
5. Examples: Some common examples of parasitic organisms include fleas, ticks, lice, tapeworms, and malaria-causing Plasmodium.
6. Impact on the Host: Parasites can cause harm to the host by taking nutrients, causing tissue damage, or transmitting diseases. However, they usually do not kill the host immediately.
7. Adaptations: Parasites often have adaptations to survive in their specific host environments. These adaptations can include camouflage, resistance to the host's immune system, or the ability to reproduce rapidly.
In conclusion, parasitic nutrition is the mode of nutrition where an organism obtains its food from the body of another living organism without killing it. Parasites have evolved specialized adaptations to survive and reproduce in their host environments, but their relationship with the host is generally harmful.
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Life Process testing - Question 3

The mode of nutrition found in fungi is:

Detailed Solution for Life Process testing - Question 3
The mode of nutrition found in fungi is Saprotrophic nutrition.
Saprotrophic nutrition:
- Saprotrophic nutrition is the mode of nutrition in which organisms obtain nutrients from dead and decaying organic matter.
- Fungi are saprotrophs, which means they obtain their nutrition by decomposing dead organic matter such as dead plants, animals, and their waste products.
- Fungi secrete enzymes that break down complex organic compounds into simpler forms, which can then be absorbed by the fungal cells.
- This process of decomposition by fungi is important for the recycling of nutrients in ecosystems.
- Fungi play a crucial role in the decomposition of organic matter and the recycling of nutrients, making them important contributors to the overall balance of ecosystems.
Other modes of nutrition:
- Parasitic nutrition: Parasitic organisms obtain nutrients from a living host organism, often causing harm or disease to the host.
- Holozoic nutrition: Holozoic organisms obtain nutrients by consuming other organisms or their parts.
- Autotrophic nutrition: Autotrophic organisms produce their own food through photosynthesis or chemosynthesis.
Importance of saprotrophic nutrition in fungi:
- Fungi play a vital role in the decomposition and recycling of organic matter.
- They break down complex organic compounds into simpler forms, releasing nutrients back into the environment.
- This process helps in the nutrient cycling and availability of essential elements for other organisms.
- Fungi also contribute to the formation of humus, a dark organic material that improves soil fertility and structure.
- Without saprotrophic fungi, dead organic matter would accumulate and nutrients would become locked up and unavailable for other organisms.
In conclusion, fungi obtain their nutrition through saprotrophic mode, which involves decomposing dead organic matter and releasing nutrients back into the environment. This process is crucial for nutrient cycling and maintaining the balance of ecosystems.
Life Process testing - Question 4

Roots of the plants absorb water from the soil through the process of:

Detailed Solution for Life Process testing - Question 4
Roots of the plants absorb water from the soil through the process of:
The correct answer is osmosis. Here is a detailed explanation:
1. Osmosis:
- Osmosis is the process by which water molecules move from an area of lower solute concentration to an area of higher solute concentration through a semipermeable membrane.
- Roots have special structures called root hairs that increase the surface area for water absorption.
- When there is a higher concentration of solutes in the root cells than in the soil, water moves into the root cells through osmosis.
- This helps in the absorption of water and dissolved nutrients from the soil.
2. Diffusion:
- Diffusion is the movement of molecules from an area of higher concentration to an area of lower concentration.
- While diffusion plays a role in nutrient uptake by roots, it is not the primary process responsible for water absorption.
3. Transpiration:
- Transpiration is the process by which water is lost from the leaves of plants through small openings called stomata.
- Transpiration creates a pulling force, known as the transpiration pull, which helps in the upward movement of water in the plant.
- While transpiration is important for the movement of water within the plant, it is not directly involved in the absorption of water from the soil.
4. None of these:
- This option is incorrect as the correct answer is osmosis.
In conclusion, the roots of plants absorb water from the soil through the process of osmosis. Osmosis allows water to move from an area of lower solute concentration (soil) to an area of higher solute concentration (root cells) through a semipermeable membrane.
Life Process testing - Question 5

The site of photosynthesis in the cells of a leaf is

Detailed Solution for Life Process testing - Question 5
The site of photosynthesis in the cells of a leaf is the chloroplast.
Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose. This process occurs in the cells of a leaf, specifically in the chloroplasts.
Chloroplasts are membrane-bound organelles found in the cells of green plants and algae. They are responsible for carrying out photosynthesis. Here is why the chloroplast is the correct answer:
- Chloroplast structure: Chloroplasts have a double membrane and contain a network of membranes called thylakoids. These thylakoids are organized into stacks called grana, and the space between the thylakoids is called the stroma. These structures are essential for the process of photosynthesis.
- Photosynthetic pigments: Chloroplasts contain pigments such as chlorophyll, which are necessary for capturing light energy. Chlorophyll absorbs light in the red and blue regions of the electromagnetic spectrum and reflects green light, giving plants their green color.
- Photosynthesis reactions: Within the chloroplasts, photosynthesis occurs in two main stages: the light-dependent reactions and the light-independent reactions. The light-dependent reactions take place in the thylakoid membranes, where light energy is converted into chemical energy in the form of ATP and NADPH. The light-independent reactions, also known as the Calvin cycle, occur in the stroma, where carbon dioxide is converted into glucose using the ATP and NADPH produced in the light-dependent reactions.
In conclusion, the site of photosynthesis in the cells of a leaf is the chloroplast, where light energy is converted into chemical energy through a series of reactions involving pigments and specialized membranes.
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