Tag: biology

Questions Related to biology

Cereals and legumes are cultivated alternatively in crop rotation process by a farmer. Which of the following are advantages of cultivating cereals and legumes alternatively?

biology improvement in food resources crop yield improvement food supply crop improvement methods and organisations

  1. When cereals are cultivated more nutrients are utilized

  2. If legumes are grown in the soil, less nutrients are utilized

  3. Legumes synthesize some nutrients as they have root nodules

  4. All of the above

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Correct Option: D
Explanation:
Cultivation of cereals followed legumes in a cultivated soil is called crop rotation. In this, Legumes have bacteria on nodules which are on the roots of the plant. The bacteria on the nodules takes nitrogen from the air and fixes it into the soil, so that other plants that require nitrogen can use it as well.  Farmers use soybeans and other legumes in rotations with grass crops such as corn or wheat. Grass crops are unable to take their own nitrogen from the air so they either need the nitrogen in the soil that the legumes provide for them in a crop rotation or they need a chemical fertilizer containing nitrogen. 
So the correct option is ' All of the above ' .

Gundhi bug is a pest of 

biology improvement in food resources crop yield improvement food supply crop improvement methods and organisations

  1. rice

  2. mustard

  3. wheat

  4. groundnut.

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Correct Option: A
Explanation:

Gundhi bug is a pest of rice. Its a small insect which attacks the ripening rice grains and make wither away. It sucks the milk from developing grains and stem in early stage of grain formation which causes foul smell in the field.

A disease can be prevented by which of the following methods?

biology health and diseases pathogen and their mode of transmission some infectious diseases diseases and immunity

  1. Health education

  2. Immunization

  3. Isolation of infection individuals

  4. All of the above

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Correct Option: D

The aim of primary principle of prevention is

biology health and diseases pathogen and their mode of transmission some infectious diseases diseases and immunity

  1. To maintain healthy population.

  2. To minimize disease.

  3. To minimize patient population.

  4. None of the above.

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Correct Option: A
Explanation:

The infection is a state in which the immune system is weak to fight against the pathogen. The infection can be prevented by maintaining a healthy population. The proper food will provide nutrients which make the body strong and healthy. This allows more production of immune cells to fight the infection. The healthy population are less likely to acquire the diseases and there will be less chances of epidemics.

Thus, the correct answer is option A. 

Infectious disease can be prevented by 

biology health and diseases pathogen and their mode of transmission some infectious diseases diseases and immunity

  1. Antibiotics

  2. Vaccines

  3. Analgesics

  4. None of the above

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Correct Option: B
Explanation:

The vaccine is made from a virus either killed, weakened or attenuated, which is introduced into the blood. This process is known as vaccination or immunization. The vaccine can be used to inject the antigen or the antibodies which provide protection against the respective disease by the production of antibodies by the plasma cells. The infectious diseases are transmitted from one infected person to the other person directly. These diseases can be prevented with the help of vaccination.

Thus, the correct answer is option B. 

Which of these diseases can spread due to the coughing of the patient?

biology infectious diseases pathogen and their mode of transmission some infectious diseases diseases and immunity health and diseases

  1. AIDS, T.B. and hepatitis

  2. T.B., influenza and cholera

  3. T.B. and influenza

  4. T.B. and hepatitis

Show answer
Correct Option: C
Explanation:

Tuberculosis is a disease caused by the bacterium Mycobacterium tuberculosis. Influenza is caused by Haemophilus influenzae.  The infected person coughs and sneezes. These diseases are transmitted through the air droplets while sneezing and coughing. The causative agent survives in the air droplets and through the air, the disease is transmitted to the other person. 

Thus, the correct answer is option C. 

Symptoms of TB include

biology infectious diseases pathogen and their mode of transmission some infectious diseases diseases and immunity health and diseases

  1. Fever

  2. Weight loss

  3. Attacks

  4. Both A and B

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Correct Option: D
Explanation:

Early symptoms of active TB can include weight loss, fever, night sweats and loss of appetite. Symptoms may be vague, however, and go unnoticed by the affected person. For some, the disease either goes into remission (halts) or becomes chronic and more debilitating with cough, chest pain and bloody sputum (saliva). 

BCG is vaccine meant for protection against 

biology infectious diseases pathogen and their mode of transmission some infectious diseases diseases and immunity health and diseases

  1. Mumps

  2. Tuberculosis

  3. Poliomyelitis

  4. Tetanus

Show answer
Correct Option: B
Explanation:

Bacillus Calmette–Guérin (BCG) vaccine is a vaccine which is primarily used against tuberculosis. In countries where tuberculosis or leprosy is common, one dose is recommended in healthy babies as close to the time of birth as possible. In areas where tuberculosis is not common, only children at high risk are typically immunized, while suspected cases of tuberculosis are individually tested for and treated.

So, the correct answer is 'Tuberculosis'.

Sign and symptoms of a particular diseases are shown related to tuberculosis?

biology infectious diseases pathogen and their mode of transmission some infectious diseases diseases and immunity health and diseases

  1. Evening rise of temperature, coughing and weight loss

  2. Infection is nasal cavity, headache, pain in stomach

  3. Infection in alveoli, chills, fever and cough

  4. Intestinal infection, persistent fever

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Correct Option: A

Administering BCG vaccine is a preventive measure against

biology infectious diseases pathogen and their mode of transmission some infectious diseases diseases and immunity health and diseases

  1. Tuberculosis 

  2. Typhoid

  3. AIDS

  4. Cholera

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Correct Option: A
Explanation:

BCG vaccine stands for Bacillus Calmette-Guerin. It is a vaccine against tuberculosis and for the treatment of some bladder cancers.
So, the correct answer is option A.