Skip to main content

Class10 life process CBSE Test paper - 05 [With Solution]

Image
By

Life Process class 10 Trend setter solved CBSE Test paper-05

SCIENCE & TECHNOLOGY (Class-10)       Chapter 6 : Life Process

1. Name the tissue associated with the conduction water in plants. (1 mark)
Ans: Xylem tissue

2. What is source of O2 liberated during photosynthesis? (1 mark)
Ans: The main source of oxygen in the atmosphere during photosynthesis is photosynthetic [green] plants, cyanobacteria and algae which releases oxygen during photosynthesis. Other sources include the photolysis of atmospheric water and nitrous oxides by ultraviolet light and the free oxygen released from the silicates and mineral oxides present in the earth crust. 

3. In which part of the digestive canal food is absorbed? (1 mark)
Ans: small intestine

4. Which organelle of the cell is known as ‘power house’? (1 mark)
Ans: Mitochondria

5. Why oxygenated and deoxygenated blood is separated in mammals and birds? (1 mark)
Ans: Oxygenated and deoxygenated blood is separated in mammals and birds as Such kind of separation allows a highly efficient supply of oxygen to the body . Birds and mammals constantly use energy to maintain their body temperature.

6. Name the functional unit of human kidney. (1 mark)
Ans: Nephron is the basic structural and functional unit of the kidney.

7. ‘Respiration is a vital function of the body’. Justify. (2 marks)
Ans: Respiration is the bodily process of inhalation and exhalation.  Through this process, oxygen is inhaled.  T his inhaled oxygen is used to burn/oxidize/break down the food (glucose). This reaction produces energy which is used to carry out various activities going on in our body. Our body need continuous supply of energy to carry out these activities.  So, respiration is continuous processes which make us able to meet energy demand of our body. If respiration comes to halt the person will die

8. Differentiate between autotroph and heterotrophs. (2 marks)
Ans: Autotrophic nutrition means that the organism is preparing its own food and is not dependent on any other organism for food. Green plants are autographs.
Heterotrophic nutrition means that the organism does not prepare its own food and is dependent on other organisms for food. All organisms which are not among green plants are heterotrophic.

9. State the two vital functions of the human kidney. (2 marks)
Ans: Function of Kidneys:
a)    Absorption of water and salt
b)    Removal of waste materials like urea, ammonia etc from blood
c)    Blood pressure control

10. Mention the role of the valves in maintaining blood flow in the heart. (2 marks)

Ans: The valves present in the heart normally allow the blood to flow in only one direction. There are four valves in the heart – mitral valve, tricuspid valve, bicuspid valve and pulmonary valve. These valves control the flow of blood by opening and closing through the heart at the time of contraction.

11. What is the structural difference between the auricles and ventricles? (2 marks)
Ans: The arteries have thick, elastic walls. They do not have valves
The Veins do not  have thick, elastic walls. They have valves.

12. How are lungs designed in human beings to maximize the area for exchange of gases(3marks)
Ans: Within the lungs, the bronchi divides into smaller and smaller tubes called bronchus which finally terminate in balloon-like structures which are called alveoli. The alveoli provide a surface where the exchange of gases can take place. The walls of the alveoli contain an extensive network of blood-vessels.
13. How are water and minerals transport in plants? (3 marks)
Ans: The components of xylem tissue (tracheids and vessels) of roots, stems, and leaves are interconnected to form a continuous system of water-conducting channels that reaches all parts of the plant. Transpiration creates a suction pressure, as a result of which water is forced into the xylem cells of the roots. Then there is a steady movement of water from the root xylem to all the plant parts through the interconnected water-conducting channels.

14. How is food transported in plants? (3 marks)
Ans: Food is transported in plants through phloem. The transport in phloem is an active process and involves use of energy. The energy in the form of ATP created osmotic gradient which results in transportation of food through phloem.

15. (i) What are the functions of liver and pancreas in the digestive system? (5 marks)
(ii) Which part of the body secretes bile? Where is bile stored?  (iii) What is trypsin? What is its function?
Ans:(i) Liver and pancreas play key roles in the digestive system. Liver secretes bile juice which helps in emulsification and digestion of fat molecules. It also aids in absorption of fat soluble vitamins like A, D E, K. While pancreas secrete pancreatic juice containing several enzymes that help in carbohydrate metabolism.
 (ii) Bile is secreted by liver. It is stored in the gall bladder till required.

 (iii) Trypsin is secreted by the duodenum of small intestine. When proteins are digested in the stomach the acidic medium is passed as such into the small intestine. The small intestine is incapable of handling such low pH and neither can its enzymes function. Hence Trypsin is released to neutralize the acidity


More to study
Labels:

Comments

Post a Comment

CBSE ADDA :By Jsunil Sir : Your Ultimate Destination for CBSE Exam Preparation and Academic Insights

Class 10 Chapter 02 Acid Bases and Salts NCERT Activity Explanation

By
NCERT Activity Chapter 02 Acid Bases and Salt Class 10 Chemistry Activity 2.1 Indicator Acid Base Red litmus No Change Blue Blue Litmus Red No change Phenolphthalein Colourless Pink Methyl Orange Pink   Yellow Indictors are substance which change colour in acidic or basic media. Activity 2.2 There are some substances whose odour changes in in acidic or basic media. These are called olfactory indicators. Like onion vanilla, onion and clove. These changes smell in basic solution. Activity 2.3 Take about 5 mL of dilute sulphuric acid in a test tube and add few pieces of zinc granules to it. => You will observe bubbles of hydrogen gas on the surface of zinc granules. Zn + H2SO4 --> ZnSO4 + H2 => Pass the Hydrogen gas through the soap solution. Bubbles formed in the soap solution as Hydrogen gas it does not get d...
Post a Comment
Read more

CBSE I NCERT 10th Numerical Problem solved Reflection and reflection of light

By
Q. 1. A concave mirror of focal length 20cm is placed 50 cm from a wall. How far from the wall an object be placed to form its real image on the wall?  Solution: V= -50 cm F= -20cm From mirror formula 1/u = 1/f – 1/v = -1/20+ 1/50 = - 3/100  U = - 33.3 cm Therefore, the distance of the object from the wall x =  50 – u X = 50 – 33.3 = 16.7 cm. Q.2. An object is placed at a distance of 40cm from a concave mirror of focal length 15cm. If the object is displaced through a distance of 20 cm towards the mirror, By how much distance is the image displaced? Answer: Here f = - 15 cm, u = - 40 cm Now 1/f = 1/u + 1/v Then 1/v = 1/f – 1/u Or V= uf/u-f =( - 40 x -15)/25 = -24 cm Then object is displaced towards the mirror let u1 be the distance object from the Mirror in its new position. Then u1 = -(40-20) = -20cm If the image is formed at a distance u1 from the mirror then v1 = u1f/u1-f = -20X-15/-20+15 = -60 cm. = - 20 x-15/-20+15 = -60 ...
2 comments
Read more

Class 10 Metal and Non MetalsChapter 03 NCERT Activity Solutions

By
X Class 10 NCERT Activity Explanation Class 10 Metals and Non Metals Activity 3.1 Page No. 37 Take samples of iron, copper, aluminium and magnesium. Note the appearance of each sample. They have a shining surface. Clean the surface of each sample by rubbing them with sand paper and note their appearance again. They become more shiny. => Freshly cut Metal have shiny surface Activity 3.2 Page No. 37 Take small pieces of iron, copper, aluminium, and magnesium. Try to cut these metals with a sharp knife and note your observations. They are very hard to cut. Hold a piece of sodium metal with a pair of tongs and try to cut it with a knife. Sodium can be cut easily with knife. Hence K and Na are soft metal cut with knife Activity 3.3 Page No. 38 Take pieces of iron, zinc, lead and copper try to strike it four or five times with a hammer. These metals are beaten into thin sheet on hammering. This property of metal is called malleability and metals are called malleable. Activity 3.4 Page ...
Post a Comment
Read more

Living science ratna sagar class 6 solutions

By
Ratna sagar living science 6 answers by jsunil. Class6 Living science solution Term-1 Living Science Solution chapter-1 Source of food Download File Living Science Solution chapter-2 Component of food Download File Living Science Solution chapter-3 Fibre to fabric Download File Living Science Sol ch-4 Sorting of material into group Download File Living Science Soln ch-5 Separation of substance Download File Living Science Solution chapter-6 Change around Us Download File Living Science Solution ch-7 Living and Non Living Download File Living Science Solution ch-8 Getting to Know Plants Download File Living Science Sol ch-9 The Body and Its movements Download File Visit given link for full answer Class6 Living science solution Term-II
Post a Comment
Read more

Electricity numerical for class 10 CBSE Trend Setter 50 Problems

By
1. The current passing through a room heater has been halved. What will happen to the heat produced by it? 2. An electric iron of resistance 20 ohm draws a current of 5 amperes. Calculate the heat produced in 30 seconds. 3. An electric heater of resistance 8 ohm takes a current of 15 A from the mains supply line. Calculate the rate at which heat is developed in the heater. 4. A resistance of 40 ohms and one of 60 ohms are arranged in series across 220 volt supply. Find the heat in joules produced by this combination in half a minute. 5. A resistance of 25 ohm is connected to a 12 V battery. Calculate the heat energy in joules generated per minute. 6. 100 joules of heat is produced per second in a 4 ohm resistor. What is the potential difference across the resistor? 7. An electric iron is connected to the mains power supply of 220 V. When the electric iron is adjusted at minimum heating’ it consumes a power of 360 W but at ‘maximum heating’ it takes a power of 840 W. Ca...
Post a Comment
Read more