10th Grade > Biology
LIFE PROCESSES MCQs
Total Questions : 56
| Page 4 of 6 pages
Answer: Option B. ->
Glucose, Amino acids, Salts
:
B
Glucose, amino acids, salts and high amount of water are reabsorbed in the nephron during the second step of urine formation, i.e., the selective reabsorption. These essential substances were filtered out from the blood in the first step called glomerular filtration and are reabsorbed as they are vital for the functioning of our body.
:
B
Glucose, amino acids, salts and high amount of water are reabsorbed in the nephron during the second step of urine formation, i.e., the selective reabsorption. These essential substances were filtered out from the blood in the first step called glomerular filtration and are reabsorbed as they are vital for the functioning of our body.
Answer: Option A. ->
By movement of cilia
:
A
:
A
Paramecium uses cilia to sweep food particles along with some water into an oral groove (a groove present on the surface of paramecium). At the end of the oral groove, a food vacuole gets created. This food vacuole further travels throughout the cytoplasm and during this journey, the food inside the vacuole gets digested and absorbed.
Answer: Option C. ->
Phloem
:
C
Translocation is the transport of soluble products of photosynthesis. It occurs in the part of the vascular tissue known as phloem. The phloem also transports amino acids and other substances. These substances are especially delivered to the storage regions of roots, fruits and seeds and to growing regions.
:
C
Translocation is the transport of soluble products of photosynthesis. It occurs in the part of the vascular tissue known as phloem. The phloem also transports amino acids and other substances. These substances are especially delivered to the storage regions of roots, fruits and seeds and to growing regions.
Answer: Option C. ->
diffusion
:
C
Diffusion is the movement of a substance from an area of higher concentration to an area of lower concentration. The air in alveoli contains higher concentration of oxygen. The alveoli are very close to capillaries, which has low oxygen concentration and high carbon dioxide as compared to alveolar air. Oxygen diffuses from the alveoli, into the blood in the capillaries. Similarly, carbon dioxide from the blood moves out of the capillaries into the alveoli.
:
C
Diffusion is the movement of a substance from an area of higher concentration to an area of lower concentration. The air in alveoli contains higher concentration of oxygen. The alveoli are very close to capillaries, which has low oxygen concentration and high carbon dioxide as compared to alveolar air. Oxygen diffuses from the alveoli, into the blood in the capillaries. Similarly, carbon dioxide from the blood moves out of the capillaries into the alveoli.
Answer: Option B. ->
Alveoli
:
B
∙ The alveoli are surrounded by tiny blood vessels, called capillaries. It is the alveoli that receive the oxygen and pass it on to the blood.
∙ Alveoli and capillaries both have very thin walls, which allow the oxygen to pass.
∙ Trachea, also called the windpipe, is a cartilaginous tube that connects the pharynx and larynx to the lungs.
∙ Nostril is either of the two external openings of the nasal cavity that allows air to enter the lungs.
∙ Bronchi are the air passages into the lungs.
:
B
∙ The alveoli are surrounded by tiny blood vessels, called capillaries. It is the alveoli that receive the oxygen and pass it on to the blood.
∙ Alveoli and capillaries both have very thin walls, which allow the oxygen to pass.
∙ Trachea, also called the windpipe, is a cartilaginous tube that connects the pharynx and larynx to the lungs.
∙ Nostril is either of the two external openings of the nasal cavity that allows air to enter the lungs.
∙ Bronchi are the air passages into the lungs.
Answer: Option A. ->
urea
:
A
Dialysis fluid contains all the constituents of the plasma except the nitrogenous wastes. Urea is the main nitrogenous waste of the body. In case of kidney failure, urea gets accumulated in the blood.
:
A
Dialysis fluid contains all the constituents of the plasma except the nitrogenous wastes. Urea is the main nitrogenous waste of the body. In case of kidney failure, urea gets accumulated in the blood.
Answer: Option B. ->
Stomata
:
B
:
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.
Answer: Option D. ->
respiration
:
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.
:
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.
Answer: Option A. ->
mouth
:
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.
:
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.
Answer: Option C. ->
Ingestion → Digestion → Absorption → Excretion
:
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.
:
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.
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