CAPF (AC) 2018 (Paper-1) (Question 1-50)

Total Questions: 50

21. On simplification the product

(x₁ + y₁)(x₂ + y₂) ..... (x₁₀ +y₁₀)

how many such terms are there which will have only single x and rest y's?

(a) 210
(b) 10
(c) 20
(d) 1

Correct Answer: (b) 10

Solution:We need to select out x of 10 terms, we can select 1 out of 10 terms, so use combination ¹⁰C₁

22. Which one of the following statements about blood elements is correct?

(a) Red blood cells' number is same as that of white blood cells and platelets.
(b) The number of white blood cells is more than red blood cells.
(c) The number of red blood cells is the highest.
(d) The number of red blood cells is lower than platelets.

Correct Answer: (c) The number of red blood cells is the highest.

Solution:The number of red blood cells is the highest

RED BLOOD CELL :- It stands for red blood cells and is also called Erythrocytes. Its main function is the transportation of the power of oxygen of the lungs. The number count of RBC in a boy is around 5lakh/microliter.

WBC :- It stands for white blood cells also called Leucocytes. These cells are the largest cells of the body. Its main function is to fight infection and other diseases. It counts 5000 to 10000 per microliter.

Platelets: -they are called Thrombocytes. They have no cell nucleus. It counts 1.5 lakh to 3.5 lakh.

23. Which one of the following statements regarding muscle contraction and relaxation is correct?

(a) It involves movement of Zn++ ion.
(b) It involves Ca⁺⁺ ion of blood.
(c) It involves release of Ca⁺⁺ from sarcoplasmic reticulum (SR) and pumping C a⁺⁺ back in SR.
(d) It involves exchange of Na and K.

Correct Answer: (c) It involves release of Ca⁺⁺ from sarcoplasmic reticulum (SR) and pumping C a⁺⁺ back in SR.

Solution:It involves the release of Ca⁺⁺ from-sarcoplasmic reticulum (SR) and pumping C Ca⁺⁺ back in SR.

Muscle contraction is the activation of tension-generating sites within muscle fibres. It begins with a signal-the neurotransmitter. The local membrane of the fibre will depolarize as positively charged.

Na⁺ ions enter triggering an action potential that speeds to the rest of the membrane and depolarizes including the T-tubules. The release of Ca⁺⁺ sarcoplasmic reticulum initiate contraction which is sustained by ATP. Muscle contraction usually ends after this Ca⁺⁺ is pumped back to the SR.

24. Which one of the following statements regarding digestion is correct?

(a) Fat present in the food is digested by trypsin and chymotrypsin.
(b) Starch of food is digested by lipases.
(c) Fat of food is digested by lipases.
(d) Nucleic acid is digested by amylases.

Correct Answer: (c) Fat of food is digested by lipases.

Solution:The correct answer is option C, i.e. fat of food is digested by lipases. Digestion is the breakdown of large insoluble bad molecules into small water-soluble food molecules so that they can b absorbed into the watery blood plasma. Digestion of food is done by the enzymes in the body. Hence, option C is the right answer while other options are incorrect.

25. Which one of the following statements is correct?

(a) In photosynthesis by green plants, carbon dioxide is used for making carbohydrate.
(b) During photosynthesis, plants use oxygen for making carbohydrate.
(c) The carbohydrate generated by plants comes from soil.
(d) The carbohydrate generated by plants comes from urea.

Correct Answer: (a) In photosynthesis by green plants, carbon dioxide is used for making carbohydrate.

Solution:The correct option is A, i.e.in photosynthesis by green plants carbon dioxide is used for making carbohydrates.

Photosynthesis: It requires sunlight, carbon dioxide and water to produce glucose. It is the process used by plants and other organisms to convert light energy into chemical energy. It occurs when plants used light energy to convert carbon oxide and water into glucose and oxygen.

Each chloroplast contains a green-coloured pigment called chlorophyll. Light energy is absorbed by chlorophyll molecules where carbon dioxide and oxygen enter through the tiny pores of stomata located into the epidermis of leaves.

26. Which one of the following statements regarding insulin hormone is correct?

(a) Insulin is a protein hormone which is not produced in human body.
(b) Insulin is a steroid hormone which is produced in human body.
(c) Insulin is a cholesterol-driven hormone given to human.
(d) Insulin is a protein hormone which is produced in human body.

Correct Answer: (d) Insulin is a protein hormone which is produced in human body.

Solution:Insulin is a protein hormone that is produced in the human body.

Insulin: It is the protein hormone produced by beta cells of the pancreatic islets. It is considered to be the main anabolic hormone of the body. It regulates the metabolism of carbohydrates, fats and protein by promoting the absorption of glucose from the blood into livery fat and skeletal muscle cells. The absorbed glucose is converted into either glucose via glycogenesis or fats via lipogenesis.

Beta cells are sensitive to blood sugar levels so they secrete insulin into the blood in response to a high level of glucose. It helps to keep the blood sugar level from getting too high(hyperglycemia) or too low (hypoglycemia).

27. Match List-I with List-II and select the correct answer using the code given below the Lists:

List-I (Limestone region)	List-II (Country)
A. Pennines	1. France
B. Yucatan Peninsula	2. Jamaica
C. Cockpit Country	3. Britain
D. Causses	4. Mexico

Code:	A	B	C	D
(a)	3	4	2	1
(b)	1	2	4	3
(c)	3	2	4	1
(d)	1	4	2	3

Correct Answer: (a)

Solution:

List-I (Limestone region)	List-II (Country)
Pennines	Britain
Yucatan Peninsula	Mexico
Cockpit Country	Jamaica
Causses	France

Hence, (a) is the right answer.

28. Which of the following cities experience the warm temperate Mediterranean climate?

1. Cape Town

2. Los Angeles

3. Adelaide

4. Santiago

Select the correct answer using the code given below.

(a) 1 and 2 only
(b) 3 and 4 only
(c) 1, 2 and 3 only
(d) 1, 2, 3 and 4

Correct Answer: (d) 1, 2, 3 and 4

Solution:Hot dry summer climates and cool dry-summer climates are often referred to as the Mediterranean.

Mediterranean Climates: - It is the climate that has dry summers that are hot or warm as well as winters that are cool or mild with moderate or high rainfall.

It includes the climates of much of the land near the Mediterranean Sea. Regions which have Mediterranean areas of western United States, down to Los Angeles, Western Cape Town in South Africa, Central Chile, Southern-Western Australia and the Coastal areas of South Australia.

29. Which one of the following is the correct descending order of Indian States in terms of their density of population (as per 2011 Census)?

(a) Bihar - Kerala - Uttar Pradesh - West Bengal
(b) West Bengal - Bihar - Kerala - Uttar Pradesh
(c) Bihar - West Bengal - Kerala - Uttar Pradesh
(d) Kerala - West Bengal - Bihar - Uttar Pradesh

Correct Answer: (c) Bihar - West Bengal - Kerala - Uttar Pradesh

Solution:The population density of Bihar as per census 2011 is 1102 and it stands at the 6th rank among all Indian States and Union Territories. While West Bengal is just behind Bihar in the population density as per census it has 1029 per square Km and is at the 7th rank. Kerala is at the 8th rank and it is population density is 859 and Uttarakhand is just behind Kerala and ranks at 9th and its density per square Km is 828. Hence, the correct answer is (c).

30. Which one of the following major river basins of India is the shortest in length and smallest in terms of catchment area?

(a) Cauvery
(b) Mahi
(c) Penner
(d) Sabarmati

Correct Answer: (d) Sabarmati

Solution:In the four given options, Sabarmati is the river that has the shortest in length and the smallest in catchment areas. While Carvery is the river which has longest in the length and the longest in catchment areas among the four rivers (given).

The Catchment area of these rivers is as below:

01. Carvery - 81,155 Sq. Km

02. Penner - 55,213 Sq. Km

03. Mahi - 34,842 Sq. Km

04. Sabarmati - 21,674Sq. Km

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