Life Processes Test

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Life Processes Test - 90

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Weekly Quiz Competition

Question 1

1 / -0

	Group A		Group B
1.	Bowman's capsule	A.	Bundle of blood capillaries seen in Bowman's capsule
2.	Glomerulus	B.	Renal dialysis
3.	Reabsorption	C.	The cup-shaped upper end of the nephron of kidney
4.	Artificial kidney	D.	Observed in marine and terrestrial animals

1- A, 2- C, 3- D, 4- B

1- B, 2- A, 3- D, 4- C

1- A, 2- D, 3- B, 4- C

1- C, 2- A, 3- D, 4- B

Solution

Bowman's capsule is a cup-like sac at the beginning of the tubular component of a nephron in the mammalian kidney that performs the first step in the filtration of blood to form urine.
The glomerulus is a cluster of capillaries located at the beginning of a nephron in the kidney. It is surrounded by a cup-like sac known as Bowman's capsule. Reabsorption is the method where the fluid and other substances are reabsorbed from the bloodstream through the glomerulus into the Bowman's capsule. This process in seen in marine and terrestrial animals to conserve water. Artificial kidney is a synonym for hemodialysis or renal dialysis and refers to the renal replacement therapies (exclusion of kidney transplantation) that are in use and/or in development.
Therefore, the correct answer is option D.

Question 2
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Chief function of HCl is

A
To maintain a low pH to prevent growth of microorganisms.

B
To facilitate absorption.

C
To maintain low pH to activate pepsinogen to form pepsin.

D
To dissolve enzyme secreted in stomach.

Solution

The gastric juice is made up of hydrochloric acid, pepsinogen and other digestive enzymes, intrinsic factor, gastrin, mucus, and bicarbonates. It has a pH ranging from 1 to 2. Its low pH is essential in activating digestive enzyme pepsinogen and convert it into the pepsin fro protein digestion and in destroying various pathogens. Thus, the correct answer is option C.
Question 3
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Mammal excretes nitrogenous wastes in the form of:

A
Ammonia

B
Amino acids

C
Urea

D
Uric acid
Solution
- The process of eliminating the metabolic and toxic substances such as nitrogenous wastes from the body of living organisms is called excretion.
- Nitrogenous waste is produced during the degradation of proteins due to the chemical transformations of the amine group of amino acid molecules.
- Nitrogenous wastes excreted by living organisms include ammonia, uric acid, and urea.
- Mammals such as humans excrete urea, while birds, reptiles, and some terrestrial invertebrates produce uric acid as waste.
So, the correct answer is option C.
Question 4
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The fluid present between the blood capillaries and the cell membrane, through which gasses, nutrients, and metabolic wastes are exchanged between the blood and the cells are called as:

A
Lymph

B
Plasma

C
Serum

D
Normal saline

Solution

The lymphatic system is responsible for returning excess interstitial fluid to the blood. Of the fluid that leaves the capillary, about 90 per cent is returned. The 10 per cent that does not return becomes part of the interstitial fluid that surrounds the tissue cells. It helps in the exchange of gases, nutrients and removes metabolic waste.
So, the correct answer is option A.
Question 5
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Small intestine receives secretions from the

A
Only liver

B
Only pancreas

C
Both A and B

D
None of the above

Solution

The small intestine is the most important part of the digestive system has three parts such as the duodenum, jejunum and the ileum. The duodenum is a short structure which is continuous with the stomach, shaped like a "C"surrounding the head of the pancreas. Only the duodenum receives the secretions in the small intestine. This receives the gastric chyme from the stomach, digestive juices and enzymes from the pancreas and bile from the gall bladder.
Therefore, the correct answer is option C.

Question 6

1 / -0

The given table shows the result of intravenous injection of substances to determine the effect of each substance on normal body variables. An appropriate amount of time was allowed between injections and the substances did not interfere with one another.

Variable	Baseline values	Values after injecting substance A	Values after injecting substance B	Values after injecting substance C	Values after injecting substance D
Serum $${ Ca }^{ ++ }$$	2.3mmol/L	2.3mmol/L	2.3mmol/L	3.0mmol/L	2.3mmol/L
Serum $${ Na }^{ + }$$	135mmol/L	135mmol/L	135mmol/L	136mmol/L	135mmol/L
Serum glucose	5.6mmol/L	3.3mmol/L	5.6mmol/L	7.4mmol/L	5.6mmol/L

The normal release of substance D will be

Soon after a meal.

When blood pressure is low.

Between meals.

When there has been limited intake of dietary calcium.

When dietary calcium is in excess.

Solution

After intravenous injection of substance D, it is seen that there is no change in the baseline values of calcium, sodium and glucose level. When the blood pressure is low it will be released, so that the blood pressure is maintained by regulating sodium, calcium and glucose level.

So, the correct answer is option B.

Question 7
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The release of the energy stored in ATP molecule takes place when it

A
Passes electrons to NADH.

B
Splits into a phosphate ion and ADP.

C
Loses electrons and becomes ADP.

D
Breaks its bonds and loses all its phosphate ions.

E
Breaks the bonds within one of its phosphate groups.

Solution

Adenosine triphosphate (ATP) is the energy currency of life. During cellular respiration, the energy formed in mitochondria is stored in the form of ATP. It provides energy for all the life activities by its breakdown into ADP and Pi. ATP contains three phosphate group which has high energy bond. On the hydrolysis of ATP energy is released and ADP formed. Since the basic reaction involves a water molecule, ATP + H$$_2$$O → ADP + Pi, this reaction is commonly referred to as the hydrolysis of ATP.
Question 8
1 / -0

Which among the following is an important function of Lymph?

A
Transport of oxygen to the brain

B
Transport of carbon dioxide to the lungs

C
Returning RBCs to the lymph nodes

D
Returning interstitial fluid to the blood

Solution

Lymph is a fluid which contains plasma and WBC, ie, Blood - RBC and it is characterized by the absence of RBC, the presence of more WBC and insoluble proteins and it is a part of tissue fluid. The main function of lymph is to return interstitial fluid back to the blood. Transport of oxygen and CO$$_2$$ takes place with the help of blood. Thus the correct option is D.
Question 9
1 / -0

Which part shows the presence of lymph node?

A
A

B
G

C
C

D
All of the above
Question 10
1 / -0

For transport of food in plants it requires ________

A
ATP and phloem

B
ADP and phloem

C
ATP and xylem

D
ADP and xylem

Solution

The process of transport of food and mineral in plants is called translocation. When food like glucose or sucrose it transferred to phloem tissue, using ATP, the concentration of water molecules decreases in that area this results in movement of water into the cells due to osmosis.

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Life Processes Test - 90

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Life Processes Test - 90

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SHARING IS CARING

Question 1

1- A, 2- C, 3- D, 4- B

1- B, 2- A, 3- D, 4- C

1- A, 2- D, 3- B, 4- C

1- C, 2- A, 3- D, 4- B

Solution

Question 2

To maintain a low pH to prevent growth of microorganisms.

To facilitate absorption.

To maintain low pH to activate pepsinogen to form pepsin.

To dissolve enzyme secreted in stomach.

Solution

Question 3

Ammonia

Amino acids

Urea

Uric acid

Solution

Question 4

Lymph

Plasma

Serum

Normal saline

Solution

Question 5

Only liver

Only pancreas

Both A and B

None of the above

Solution

Question 6

Soon after a meal.

When blood pressure is low.

Between meals.

When there has been limited intake of dietary calcium.

When dietary calcium is in excess.

Solution

Question 7

Passes electrons to NADH.

Splits into a phosphate ion and ADP.

Loses electrons and becomes ADP.

Breaks its bonds and loses all its phosphate ions.

Breaks the bonds within one of its phosphate groups.

Solution

Question 8

Transport of oxygen to the brain

Transport of carbon dioxide to the lungs

Returning RBCs to the lymph nodes

Returning interstitial fluid to the blood

Solution

Question 9

A

G

C

All of the above

Question 10

ATP and phloem

ADP and phloem

ATP and xylem

ADP and xylem

Solution

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