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CBSE Questions for Class 9 Biology Why Do We Fall Ill Quiz 4 - MCQExams.com
CBSE
Class 9 Biology
Why Do We Fall Ill
Quiz 4
Given below is a pedigree chart showing the inheritance of a certain diseases :
Identify the type of the disease.
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dominant X-linked
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Autosomal dominant
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dominant Y-linked
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Autosomal recessive
During a disease:
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Changes occur which give rise to signs and symptoms of disease.
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Either the functioning or the appearance of one more system of the body will change for the worse.
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Both are incorrect.
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Both (A) and (B) are correct.
Explanation
During a disease, changes occur in appearance that indicates the manifestation of a disease - for example- The colour of the white of the eye turning yellow, the occurrence of boils and rashes on the skin during chickenpox. Diarrhoea affects the digestive system, leading to its malfunctioning, resulting in the passing of watery stools frequently causing acute dehydration. It is due to the defective functioning of affected tissues and organs.
The correct answer is '
Both (A) and (B) are correct'.
Social equality and harmony are necessary for individual health.
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True
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False
Explanation
Humans are social animals and as such the society we live in plays an important role in our health. The physical environment is dependent on the social environment.
so, the given statement is 'True'
Chronic diseases have long-lasting drastic effects on people's health as compared to acute diseases.
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True
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False
Explanation
Chronic diseases last for a long time (Example; Elephantiasis) or even for the entire lifetime Example- Polio and cause permanent damage to the body or may result in death. Acute infections last for a few days and do not cause any permanent damage or death. Example- the common cold.
So, the given statement is 'True'.
Which of these is an acute disease?
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Common cold
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Elephaniasis
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AIDS
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Jaundice
Explanation
Acute disease can be defined as a disease that occurs suddenly and lasts for a few days.
Hence, from the given options the common cold is an acute disease.
It lasts for a week. Symptoms include cough, headache, fever, etc. It does not have a long-lasting adverse effect on the body.
So, the correct answer is '
Common cold'.
A person who is disease free is always healthy.
Is the above statement true or false?
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True
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False
Explanation
Health is defined as a state of complete physical, mental and
social well-being. Health does not simply mean ‘absence of disease’ or ‘physical
fitness’.
Hence the statement is false.
Disease-free state is a state a physical, social and mental well being.
Is the above statement true or false?
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True
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False
Explanation
The given statement is false. The state of physical, mental, and social well-being is called health. Disease-free indicates only the absence of a disease but not being healthy.
The term 'Health' is defined in many ways. The most accurate definition of health
would be:
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Health is the state of body and mind in a balanced condition.
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Health is the reflection of a smiling face.
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Health is a state of complete physical, mental and social well-being.
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Health is the symbol of economic prosperity.
Explanation
Even if a person is physically fit, a lack of mental or social wellbeing will hamper the quality of life of an individual.
So, health can be best defined as 'A state of complete physical, mental and social well-being '.
Hence, the correct option is C.
Which of the following depends on not only the individual but also on the community?
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Health
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Disease
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Both A and B
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None of these
Explanation
Health of an individual depends on himself, his environment and the society in which he lives. On the other hand, disease is the abnormality in the body functioning of the individual.
Hence the correct option is A.
Social equality is essential for health.
Is the above statement true or false?
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True
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False
Explanation
We need to be happy in order to be truly healthy, and if we mistreat each other and are afraid of each other, we cannot be happy or healthy. Social equality and harmony are therefore necessary for individual health.
Hence the statement is true.
The health of an organism depends upon the surrounding environmental conditions. This statement is _____.
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True
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False
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Data insufficient
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Ambiguous
Explanation
Health is a state of complete physical, mental and social well-being and not merely the absence of diseases.
One can be considered to be in a state of positive health when his/her surrounding conditions provide him/her a healthy environment.
Unhygienic conditions like sewage, domestic water, garbage, toxic substances, and harmful gases pollute the surrounding environment which may cause several diseases and disorders that ultimately deteriorate the health of a person.
Thus, option A is correct.
Health depends on which of the following factor?
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Physical
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Social
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Mental
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All of the above
Explanation
Health is a state of complete physical, mental and social well-being and not merely the absence of diseases. One can be considered to be in a state of positive health when his/her surrounding conditions provide him/her a healthy environment.
Thus, Option D is correct.
Health is defined as ___________.
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State of complete physical, mental and social well being
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Absence of disease or infirmity
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Losing of body weight
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Increase in body weight
Which one of the following is not important for individual health?
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Living in unclean places
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Bad economic conditions
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Living in a large and well-furnished house
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All of the above
Explanation
Correct Option: D
Explanation:
Individual Health is a state of good social, physical and mental state. living in large and well-furnished house is not important unless it have cleanliness good social environment and harmony.
Therefore, the correct option is D.
Ways to limit exposure to communicable diseases:
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Washing the hands
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Eating balanced diet
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Both A and B
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Drinking soda
Explanation
Diseases can be prevented by taking some measures like washing the hands, eating a balanced diet, maintain personal hygiene, etc. taking necessary precautions while looking after a person suffering from infectious disease to limit exposure to communicable diseases.
Drinking soda regularly causes a negative effect in the gut.
Thus, option A is correct.
You are aware of polio eradication programme in your city. Children are vaccinated because
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Vaccination kills the polio causing microorganisms
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Prevents the entry of polio causing organism
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It creates immunity in the body
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All of the above
Explanation
The vaccine contains weakened or killed microbe, its toxin or one of its surface proteins. It provides the individual active acquired immunity. For example, if a child is given polio vaccine then that child will be immune to polio disease as it will activate the immune response and lead to the production of antibody and even the memory cells gets prepared against the attack. So, the correct answer is option C.
Raju was suffering from severe stomach pain and the doctor diagnosed that he was suffering from peptic ulcers and treated him with antibiotics. He was relieved of pain. What could be the reason for peptic ulcers?
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Reduced secretion of hormones
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Reduced water content
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Growth of
Helicobacter pylori
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Growth of
Haemophilus ducreyi
Explanation
Peptic ulcer disease refers to painful sores or ulcers in the lining of the stomach and the first part of the small intestine called the duodenum. Most ulcers are caused by an infection from bacteria called
Helicobacter pylori (H. pylori)
.
Hence, the correct option is C.
The process of vaccination was discovered by
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Edward Jenner
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Robert Koch
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Louis Pasteur
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Alexander Flemming
Explanation
Edward Jenner is well known around the world for his innovative contribution to immunization and the ultimate eradication of smallpox. Jenner is widely regarded as the Father of immunology.
Hence the correct option is A.
Name the disease that causes acidity-related pain and bleeding in the stomach and duodenum of affected humans.
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Peptic ulcers
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Asthma
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Fever
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None of the above
Which of the following statements is correct?
Common cold - Droplet infection.
Typhoid - Contaminated food and water.
AIDS - Shaking hands.
Ringworm - Using infected towels.
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1 and 2
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3 and 4
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1 and 3
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1, 2 and 4
Explanation
Common cold can spread from one person to another as it is communicable in nature. A healthy person can get infected by being in close vicinity of an infected person when he/she sneezes, coughs, as the droplets generated by sneeze and cough contain infecting agents.
Typhoid occurs by the intake of contaminated water and food while ringworm is one of the skin diseases which can spread from one person to another by the use of infected towels and handkerchiefs.
AIDS (Acquired Immuno Deficiency) is is spread via body fluids and does not spread by shaking hands.
Therefore, the correct answer is option D.
Peptic ulcers in the stomach and duodenum, which cause pain and bleeding are caused by ________.
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Helicobacter pylori
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Salmonella
species
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Trichenella spiralis
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Pasteurella pestis
Explanation
Peptic ulcers is a bacterial disease caused by the bacterium
Helicobacter pylori.
For effective treatment of a disease:
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Early diagnosis is required but understanding of its pathophysiology is not required.
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Early diagnosis is not required but understanding of its pathophysiology is required.
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Early diagnosis and understanding of its pathophysiology are required.
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Neither early diagnosis nor understanding of its pathophysiology is required.
Explanation
For effective treatment of a disease, early diagnosis and understanding its pathophysiology is very important. Using conventional methods of diagnosis (serum and urine analysis, etc.) early detection is not possible. Recombinant DNA technology, Polymerase Chain Reaction (PCR) and Enzyme-Linked Immuno-sorbent Assay (ELISA) are some of the techniques that serve the purpose of early diagnosis.
Reena had a high temperature and body ache. She went to see a doctor. The doctor gave her some medicine and Reena felt better in $$3-4$$ days. How can it be concluded that Reena suffered from an acute disease?
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Symptoms of the disease were clear
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Diagnosis of the disease was fast
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The recovery period was short
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Medicines were required for the treatment
Explanation
A.
The recovery period was short
Solution : The recovery period was short and the disease lasted for a short time and the body immune system was able to eliminate it as it was acute.
So the correct answer is "
The recovery period was short".
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