Question
Distinguish between : S.A. Node and A.V. Node.
✓
Answer
| S.A. Node | A.V. Node |
| 1. Sinoatrial node is present in the right ventricle near the opening near the opening of the superior vena cava. | 1. Atrioventricular node is present in the right ventricle near the opening of the coronary sinus. |
| 2. S.A. node is the pacemaker of the heart and it starts atrial systole. | 2. A.V. node starts ventricular systole through bundles of His and Purkinje’s fibre system. |
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Read the following and answer any four questions from (i) to (v) given below:
Study the two cases carefully regarding the pattern of inheritance of disease.
Study the given pedigree chart showing the inheritance pattern as case II.
Study the two cases carefully regarding the pattern of inheritance of disease.
|
Case
|
Mother
|
Father
|
Children
|
|
Case I
|
With disease
|
Normal
|
Sons always with diseases
|
|
Case II
|
With disease
|
Normal
|
Sons and daughters could show disease
|
- Which of the following diseases is not an example of case I?
- Haemophilia.
- Colour blindness.
- Aa, AA, Aa, Aa, aa
- Night blindness.
- Which of the following is impossible for a case I?
- Carrier mother to pass the gene to her son.
- Diseased father to pass the gene to his daughter.
- Diseased father to pass the gene to his son.
- Carrier mother to pass the gene to her daughter.
- If inheritance pattern of disease is as case II and both parents are carrier of disease what are the chances of pregnancy resulting in an affected child?
- 25%
- 100%
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- Disease that follows inheritance pattern as case I is linked with?
- Autosomes.
- X chromosome.
- Y chromosome
- Chromosome 21.
- Study the given pedigree chart showing the inheritance pattern as case II.
Study the given pedigree chart showing the inheritance pattern as case II.
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Distinguish between : Electrical and chemical synapses:
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| (2) O.E | (b) Pressure potential |
| (3) T.P | (c) Water potential |
What is the cause of frameshift mutation?
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| (1) Larynx | (a) Lid of larynx |
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Read the following and answer any four questions from (i) to (v) given below:
Priya was 4 years old when she contracted chicken pox. It took her around 15 days to recover completely. Now Priya is 5 years old, so her mother got her vaccinated few days back for DPT ($5^{th}$ dose) as per immunisation program. Recently she was playing with her friend in the park when her friend accidently fell on iron pipe and badly bruised her knee. She was taken to the hospital where doctor gave her ATS injection and painkillers. Based on the above information, answer the following questions.
→Priya was 4 years old when she contracted chicken pox. It took her around 15 days to recover completely. Now Priya is 5 years old, so her mother got her vaccinated few days back for DPT ($5^{th}$ dose) as per immunisation program. Recently she was playing with her friend in the park when her friend accidently fell on iron pipe and badly bruised her knee. She was taken to the hospital where doctor gave her ATS injection and painkillers. Based on the above information, answer the following questions.
- Select the correct statement.
- Priya has developed natural active immunity against chicken pox.
- Priya has developed artificial active immunity against DPT.
- Priya's friend has developed artificial passive immunity against tetanus.
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- Administration of AGS (anti gas gangrene serum) in a person.
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- A person recovered from viral infection.
- A child vaccinated for polio.
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- It has no side effects.
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- Both assertion and reason are true and reason is the correct explanation of assertion.
- Both assertion and reason are true, but reason is not the correct explanation of assertion.
- Assertion is true, but reason is false.
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| (2) Crescograph | (b) Increase in height of plant |
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