Life Processes Important Questions Class 10 Science with Solutions

Class 10 is a crucial year of every student’s life. Being the first board, students are always afraid of it. Well,  we understand the concern of students, and that’s why Educart has come up with class 10 important questions for helping students make their preparation strong and giving them a tool to check their preparation. 

Class 10 Science contains various chapters that are useful for the students even in their competitive examinations like JEE & NEET. By understanding the concepts given in Life Processes you get to know various activities that are performed by the organisms. Some important life processes are nutrition, transportation, metabolism, respiration, reproduction and excretion from which Life Processes Class 10 Important Questions are framed in final examinations.

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Chapter 5 Life Process: Important Questions

1. Which of the following must be valid for a dialysis chamber? Circle 'Yes' or ‘No' to indicate your response.

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Ans.  

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Explanation: 

(i)The patient's body may reuse the dialysis solution.

Hemodialysis involves passing the used dialysate fluid through a sorbent filter and a degassing chamber before returning it to the patient. Additionally, numerous medical facilities reuse dialyzers repeatedly, either for a predefined number of uses or until they are no longer functional.

In peritoneal dialysis (PD), particularly in continuous ambulatory peritoneal dialysis (CAPD), a bag of dialysis solution is attached to a tube put into the patient's belly. The used solution is subsequently drained and substituted with a fresh solution via gravity.

(ii) Yes, the hollow fibers in a dialyzer must have semi-permeable walls.

The semi-permeable membrane within the hollow fibers of the dialyzer serves as a barrier separating the blood from the dialysate. This membrane allows waste products and excess fluid to pass out of the blood while restricting larger molecules or essential components from crossing. This procedure guarantees the elimination of toxins, sustains acid-base equilibrium, and modulates electrolyte concentrations in the bloodstream.

(iii) Indeed, sustaining elevated blood flow during dialysis is essential to guarantee that the optimal volume of blood traverses the dialyzer. This accelerates the velocity of solutes in the bloodstream, thereby increasing the rate of diffusion. Due to the shortness of dialysis sessions, elevated blood flow is essential for optimal solute clearance.

During the operation, the hemodialysis machine continually checks the patient's blood pressure and may change the blood flow pace as needed.

Dialysis functions as a substitute for certain renal activities by eliminating waste products and surplus fluid from the bloodstream. It also helps regulate blood pressure and maintain a proper balance of minerals in the body.

2. What type of blood vessel brings in the blood with wastes?

Ans. The renal vein is a blood vessel that transports waste-filled blood to the kidney. The afferent arteriole, another blood vessel, delivers blood containing nitrogenous wastes to the Bowman's capsule within the kidney.

The cardiovascular system comprises the heart, blood vessels, and blood. There are three primary types of blood vessels:

• Arteries: Transport blood away from the heart to various organs.
• Veins: Carry blood back to the heart from the organs.
• Capillaries: Small, thin vessels that connect arteries and veins, facilitating the exchange of oxygen, nutrients, and waste products.

3. Which organ acts like a natural dialysis chamber in the human body? 

a. Heart

b. Brain

c. Kidneys

d. Pancreas 

Ans. (c) Kidneys

Explanation: 

Function
The kidneys filter the blood, removing waste products and excess fluids while regulating the levels of various substances in the blood. They play a vital role in maintaining a healthy balance of water, salts, and minerals.

Location
Most people have two kidneys, which are located in the back of the abdomen, just below the ribcage, on either side of the spine.

Importance
When the kidneys fail to function properly, dialysis can take over by removing waste products, excess salt, and water from the body. It also helps maintain safe levels of minerals and vitamins while regulating blood pressure.

4. Sanjeev wanted to check whether plant leaves release water vapour. He took a potted plant and covered the plant with a plastic bag. The picture below shows what he observed after 2 hours.

Sanjeev compared the results of the activity with a new pot to confirm his findings. Which of the following best represents the new pot?

Ans. Option B 

Explanation: When a plant is covered and sealed with a plastic bag, it eventually dies due to a depletion of starch. Plants require carbon dioxide, water, and sunlight to produce food through photosynthesis, a process that occurs in the presence of chlorophyll. When the plant is enclosed, access to fresh carbon dioxide is restricted, disrupting photosynthesis. Over time, the plant exhausts its stored starch and cannot sustain itself, leading to its death.

5. How does the loss of water by plant leaves help the plant? Mention two points. 

Ans. Transpiration, the loss of water vapor from plant leaves, serves several essential functions:

• Cooling: Transpiration cools plants by releasing water vapor from the leaves, which is particularly beneficial on hot days.
• Maintaining structure: It helps maintain the turgidity of plant cells, which is crucial for young plants without woody stems.
• Transpirational pull: Transpiration creates a suction force that draws water upward through the plant's xylem vessels.
• Mineral transport: It aids in transporting minerals from the soil to different parts of the plant.
• Osmosis: Transpiration plays a role in maintaining osmotic balance within the plant.
• Cell division: By maintaining cell turgidity, transpiration supports cell division.

Transpiration is a passive process that does not require energy from the plant. It occurs through stomata, tiny pores on the leaves formed by two bean-shaped guard cells. External factors such as temperature, light, and humidity influence the rate of transpiration.

6. Blood transports oxygen and carbon dioxide to different parts of the human body. The exchange of gases between blood and inhaled air takes place in the capillaries of the lungs. The diagram below shows how blood circulates in the human body.

What statement is supported by the diagram? 

a. All arteries carry oxygenated blood.

b. Capillaries are permeable to gases. 

c. The wall between the left ventricle and the right ventricle is porous. 

d. Blood can flow back and forth between the right atrium and the right ventricle.

Ans. (b) Capillaries are permeable to gases.  

Explanation: Capillaries are the smallest blood vessels in the body and are permeable to gases, enabling the exchange of oxygen and carbon dioxide. They also facilitate the exchange of other substances, including water, glucose, urea, uric acid, lactic acid, and creatinine.

7. Which of these will be the immediate effect if gaseous exchange in the lung capillaries reduces? 

a. Blood will flow in the reverse direction

b. Pulmonary veins will receive blood with less oxygen

c. The space between the left and the right ventricle will increase

d. The pressure of the blood inside the capillaries with a decrease

Ans. (b) Pulmonary veins will receive blood with less oxygen.

‍Explanation: When the exchange of gases in the lung capillaries is reduced, less oxygen is transferred from the alveoli to the blood. As a result, the blood becomes less oxygenated and is carried by the pulmonary veins to the left atrium of the heart.During normal breathing, the lungs take in and expel about 5 to 8 liters of air per minute. This facilitates the transfer of approximately 0.3 liters of oxygen from the alveoli to the blood each minute.

8. The diagram below shows the human alimentary canal. 1, 2, 3 and 4 are four different organs that are parts of the canal.

Which of the labeled parts represents the liver? 

a. 1 

b. 2 

c. 3 

d. 4

Ans. (a) 1

‍Explanation: Liver – The liver is the largest gland in the digestive system. It secretes bile, which aids in the digestion of fats, breaking them down into fatty acids and glycerol.

9. Which of the following will be adversely affected in Mr. Ayub's body? 

a. Digestion of carbohydrates

b. Digestion of proteins

c. Digestion of fats

d. Digestion of vitamins 

Ans. (c) Digestion of fats 

‍Explanation: If Mr. Ayub has a malfunctioning pancreas, the digestion of fats in his body will be negatively impacted.The pancreas secretes enzymes that break down fats, carbohydrates, and proteins. It produces the enzyme lipase, which, along with bile from the liver, helps break down fats. Bile emulsifies fats, increasing their surface area and making it easier for digestive enzymes to break them down.

10. Tiny hair-like structures line the upper part of the human respiratory tract. These structures trap the dust particles, germs and chemicals entering the human body during breathing.

Smoking is likely to cause infections in the respiratory tract. Which statement best explains the fact? 

a. Smoking destroys the hair-like structures.

b. Smoking causes excessive growth of hair-like structures. 

c. Smoking stimulates the hair-like structures to release harmful chemicals. 

d. Smoking makes the hair-like structures wet, and they fail to trap dust particles

Ans. (a) Smoking destroys the hair-like structures

‍Explanation: These "hair-like structures" are called cilia, and they play a vital role in filtering out dust and debris from the air we breathe. Smoking damages and paralyzes these cilia, preventing them from effectively clearing the airways, which increases the risk of respiratory infections.

‍Why the other options are incorrect:

• B. Smoking causes excessive growth of hair-like structures: This is false. Smoking actually damages and destroys cilia, not causing them to grow excessively.
• C. Smoking stimulates the hair-like structures to release harmful chemicals: Although smoking introduces harmful chemicals into the respiratory tract, it does not cause the cilia to release them.
• D. Smoking makes the hair-like structures wet, and they fail to trap dust particles: While smoking can increase mucus production, the primary issue is the damage to the cilia, not just their wetness.

Why Focus on Life Processes in Class 10: Important Questions? 

Studying Life Processes, class 10: Important Questions, helps students identify important areas of the chapter that are often repeated in exams.  These questions were collected after analysing the previous year's exam papers and understanding the CBSE board exam pattern.

• By practicing important questions about life processes in class 10, students can focus on the most frequently occurring concepts like the different modes of nutrition (autotrophic and heterotrophic), the mechanisms of respiration, the circulatory system, and excretory processes.
• With a set of important questions, students can allocate their study time efficiently. To avoid getting lost in the lengthy syllabus, they can focus on exam-like questions.
• The Life Processes class 10 important questions with answers in PDF format available on Educart provide a concise and clear answer structure. 
• By continuously practicing these important questions, students become more confident in answering both short and long-answer type questions, which is a major part of the board exams. Familiarity with the question pattern also helps reduce anxiety during the actual exam.

How to Use Life Processes Important Questions in Your Study Routine

It's not enough to simply have access to life processes in class 10 for important questions. Adding these questions into your daily study routine is the secret to acing this chapter.

• Before jumping into solving the important questions, ensure that you have a thorough understanding of the chapter’s core concepts. Go through your textbook or watch videos explaining the fundamental ideas of life processes, such as nutrition, respiration, and excretion. This will help you comprehend the important questions better and enable you to answer them with confidence. 
• Break down the chapter into sections: Nutrition, Respiration, Transportation, and Excretion. For each section, use the life processes class 10 important questions with answers PDF and allocate specific study sessions to handle these questions. For example, dedicate one day to nutrition-related questions and the next day to respiration.
• A highly effective study technique is active recall, which involves attempting to answer a question without looking at the notes first. For each important question, write down your answer, and then check it against the solution in the PDF. 
• To get used to exam pressure, practice answering class 10 life process important questions under timed conditions. This will train you to manage time effectively during the real exam, ensuring you can complete all questions without rushing.
• Some of the life processes in class 10 important questions require detailed explanations, especially those related to complex processes like the human circulatory system or photosynthesis. Practice drawing labeled diagrams and flowcharts. This not only helps in gaining clarity but also ensures that you can present your answers in an organised manner during the exam, which can help you score better.
• Make a habit of solving a few questions daily. This consistency will help retain the concepts better and make exam preparation less stressful.
• After completing the important questions, ensure that you revise them. The more you practice, the more comfortable you’ll be with the exam format.

Benefits of Accessing Life Processes Important Questions with Answers PDF

For students, access to the Life Processes Class 10 Important Questions with Answers PDF can be incredibly valuable.  These PDFs provide clear, concise, and structured answers to important questions, allowing for simple revision. Here are some key advantages of using these resources:

• Portability: The PDF format allows you to carry your study material anywhere, whether on your phone, tablet, or laptop.
• Pre-structured Answers: The answers provided in these PDFs are written by subject experts, and aligned to the CBSE guidelines.
• Time-saving: Instead of spending hours writing and organising notes, the PDF provides you with everything in one place. This saves time, allowing you to focus more on revision and practice rather than gathering study materials.

Focussing on life processes and class 10 important questions is a strategic way to prepare for your CBSE Class 10 Science exams. By systematically incorporating these questions into your study routine, using life processes class 10 important questions with answers PDF for quick revisions, and practicing extra questions, you can ensure a deep understanding of the chapter. This approach not only enhances your exam preparation but also equips you with the knowledge to excel in your future biology studies.

Studying smart, with a focus on the right questions, is key to success in Class 10 Science. Remember, consistency and regular practice of these life processes and important questions will set you up for achieving high marks in your exams.

We hope that you practise the above Life Processes Class 10 Extra Questions With Answers and achieve your dream marks.

All the best!