Free Life Processes 02 Practice Test - 10th Grade
Question 1
The process involving oxidation of food to release energy is known as _________ .
SOLUTION
Solution : D
Respiration involves breakdown of glucose. It produces carbon, water and releases energy in the form of ATP. It is a biochemical process and takes place inside the cell. The released energy is utilized for various metabolic activities.
Question 2
The tiny pores through which leaves take in carbon dioxide from the atmosphere are known as:
Spiracles
Stomata
Xylem
Phloem
SOLUTION
Solution : B
Leaves of the plants have microscopic openings called stomata. These stomata help in the process of exchange of gases i.e., uptake of CO2 and release of by product of photosynthesis i.e., oxygen, into the atmosphere.
Question 3
The process of obtaining food to meet the energy demands of the body is known as ________ .
SOLUTION
Solution : C
The process of obtaining food to meet the energy demands of the body is known as nutrition. It is the most important step because without nutrition there will be no energy available for any other life processes. In simple words, it's the fuel which enables the car to run.
Question 4
The smallest blood vessel of the circulatory system is known as the _______ .
SOLUTION
Solution : C
In our circulatory system, the artery divides into smaller and smaller vessels to bring the blood in contact with all the individual cells. These small vessels have walls which are one-cell thick and are known as capillaries. Exchange of material between the blood and surrounding cells take place across this thin wall. The capillaries then join together to form veins that carry the blood away from the organ or tissue.
Question 5
The process of digestion of food starts in the _______ .
SOLUTION
Solution : A
The digestion process of food begins in the mouth by the enzymes present in the saliva. The functions of saliva include moistening food, and helping to create a food bolus, which can be swallowed easily. Salivary amylase is an enzyme in saliva that breaks down complex molecules such as starch into simpler molecules. Hence, digestion process begins from the mouth.
Question 6
Dysfunction in _____ can affect the quality of life while other life processess are still working as usual.
SOLUTION
Solution : A, B, C, and D
In order to enjoy a healthy life, all the life processes in our body must function well. A dysfunction in any of these processes can affect the working of other processes and the overall quality of life will be degraded.
Question 7
The human heart consists of _____ chambers.
2
3
4
5
SOLUTION
Solution : C
The human heart consists of four chambers: two atria, which are the receiving chambers of the heart and two ventricles, which are the pumping chambers of the heart. A fish heart has two chambers and a frog heart has 3 chambers.
Question 8
Which of these is FALSE about nutrition in amoeba?
Amoeba first breaks down the food into simpler particles and then swallows it
The food is swallowed by amoeba creating a food vacuole
Digestion of food takes place in an amoeba with the help of digestive juices
Amoeba makes use of pseudopodia for movement and to capture food
SOLUTION
Solution : A
Nutrition in an amoeba occurs through a process called phagocytosis where the entire organism pretty much engulfs the food it plans on eating up. As amoeba is a unicellular organism, it does not have any specialized organ for the mechanism of nutrition. It directly swallows the whole food and a food vacuole is created. Digestive juices then get secreted in the vacuole and the food is slowly digested. After this, the waste is excreted.
Question 9
Which of these is the correct sequence in the process of digestion?
Digestion → Ingestion → Absorption → Excretion
Excretion → Absorption → Ingestion → Digestion
Ingestion → Digestion → Absorption → Excretion
Ingestion → Absorption → Digestion → Excretion
SOLUTION
Solution : C
Digestion process involves the following steps -
∙ Ingestion or the process in which food is taken in the body.
∙ Digestion or the process in which complex food particles are broken down into simpler substances.
∙ Absorption or the process in which the digested food is absorbed into the body.
∙ The byproducts of metabolic reactions which are not useful for the body are eliminated through the process called excretion.
Question 10
Identify the structure shown below:
SOLUTION
Solution : C
∙ Alveoli are balloon-like structures present in lungs. They provide a large surface area for exchange of gases. Their walls have an extensive network of blood vessels.
∙ Arteries carry oxygenated blood from the heart to all parts of the body.
∙ Air passes through the pharynx into the wind pipe. Both food pipe and wind pipe originate here. It is commonly referred as throat.
∙ Capillaries are the smallest blood vessels in our body where nutrient and waste exchange between blood and tissues takes place.