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- Question
The mammalian heart is myogenic and it is regulated by nerves. The heartbeat originates from
Options- A. sinoatrial node
- B. QRS wave
- C. T wave
- D. hepatic portal system
- Correct Answer
- T wave
ExplanationThe mammalian heartis called myogenic (myo = muscle, genie = originating from). It means the heart beat or the activities of the heart are auto regulated which originates from a muscle called nodal tissue.In the human heart,heartbeat originates and contraction is initiated by a special modified heart muscle known as sinoatrial node. It is located in the right atrium; while the QRS waves are the depolarisation of the ventricles, which initiates the ventricular contraction.The T-wave represents the repolarisation,that is, the return of the ventricles from excited tonormal state.Hepatic portal system is the unique vascular connection that exists between the digestive tract and liver. This vein carries blood from intestine to the liver.
- 1. Kwashiorkor disease in children is caused by
Options- A. sufficient carbohydrates but less fats in diet
- B. sufficient carbohydrates and fats but deficient proteins in diet
- C. sufficient vitamins but deficient fats in diet
- D. sufficient fats but deficient vitamins in diet Discuss
- 2. AIDS is caused by the Human Immunodeficiency Virus (HIV). The transmission of HIV infection generally occurs through
Options- A. eating contaminated food and water
- B. transfusion of contaminated blood and blood products
- C. inhaling polluted air
- D. shaking hand with infected person Discuss
- 3. The process of copying genetic information from one strand of DNA into RNA is termed as
Options- A. translation
- B. transcription
- C. replication
- D. mutation Discuss
- 4. Nephron is related to which of the following system of human body?
Options- A. Circulatory system
- B. Excretory system
- C. Reproductive system
- D. Respiratory system Discuss
- 5. Plant tissues are of how many types?
Options- A. 3
- B. 2
- C. 5
- D. 6 Discuss
- 6. Which one of the following with regard to Aridisol, one of the soil orders, is not correct?
Options- A. Lack of water for plants during most part of the years
- B. High organic matter
- C. Large accumulation of carbonates at depth
- D. Absence of deep wide cracks Discuss
- 7. What is full form of BOD?
Options- A. Biological Oxygen Deficit
- B. Biological Oxygen Difference
- C. Biological Oxygen Demand
- D. Biological Oxygen Distribution Discuss
- 8. Alveoli is related to which of the following system of human body?
Options- A. Circulatory system
- B. Excretory system
- C. Reproductive system
- D. Respiratory system Discuss
- 9. Night Blindness is caused by deficiency of which of the following Vitamin?
Options- A. Vitamin B
- B. Vitamin C
- C. Vitamin K
- D. Vitamin A Discuss
- 10. Which blood group is universal donor?
Options- A. O+
- B. O?
- C. AB?
- D. AB+ Discuss
Biology problems
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Correct Answer: sufficient carbohydrates and fats but deficient proteins in diet
Explanation:
Kwashiorkar is produced by protein deficiency unaccompanied by calorie deficiency. It results from the replacement of mother?s milk by a high calorie-low protein diet in a child more than one year in age. Like marasmus, kwashiorkor shows wasting of muscles, thinning of limbs, failure of growth and brain development
Correct Answer: transfusion of contaminated blood and blood products
Explanation:
AIDS is caused by the Human Immuno deficiency Virus (HIV), a member of a group of viruses called retrovirus, which have an envelope enclosing the RNA genome. Transmission of HIV-infection generally occurs by (a) sexual contact with infected person, (b) by transfusion of contaminated blood and blood products, (c) by sharing infected needles as in the case of intravenous drug abusers and (d) from infected mother to her child through placenta.
Correct Answer: transcription
Explanation:
The process of copying genetic information from one strand of the DNA into RNA is termed as transcription. In transcription, only a segment of DNA and only one of the strands is copied into RNA. This necessitates defining the boundaries that would demarcate the region and the strand of DNA that would be transcribed.
Correct Answer: Excretory system
Correct Answer: 3
Correct Answer: High organic matter
Explanation:
All are correct except B as Aridisol is just like sand like soil as in Arid region e.g. In Rajasthan, so there will be very less amount of organic matter.
Correct Answer: Biological Oxygen Demand
Correct Answer: Respiratory system
Correct Answer: Vitamin A
Correct Answer: O?
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