What is common between chloroplasts, chromoplasts and leucoplasts

1.  Presence of pigments

2.  Possession of thylakoids and grana

3.  Storage of starch, proteins and lipids

4.  Ability to multiply by a fission-like process

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4
Correct Answer :

Ability to multiply by a fission-like process


Explanation :
No Explanation available for this question

Given below is a table comparing the effects of sympathetic (S) and parasympathetic (P) nervous system for four features (a - d). Which one feature (F) is correctly described

1.  F => Salivary gland, S => Stimulates secretion, P => Inhibits secretion

2.  F => Pupil of the eye, S => Dilate, P => Constricts

3.  F => Heart rate, S => Decreases, P => Increases

4.  F => Intestinal peristalsis, S => Stimulates, P => Inhibits

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Correct Answer :

F => Pupil of the eye, S => Dilate, P => Constricts


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Genes present in the cytoplasm of eukaryotic cells, are found in:

1.  mitochondria and inherited via egg cytoplasm

2.  lysosomes and peroxisomes

3.  golgi bodies and smooth endoplasmic reticulum

4.  plastids and inherited via male gamete

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Correct Answer :

mitochondria and inherited via egg cytoplasm


Explanation :
No Explanation available for this question

Assertion : A person who has received a cut and is bleeding needs to be given anti-tetanus treatment. Reason : Anti-tetanus injection provides immunity by producing antibodies for tetanus.

1.  (a)

2.  (b)

3.  (c)

4.  (d)

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Correct Answer :

(c)


Explanation :
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Assertion : Cancer cells are virtually immortal until the body in which they resides dies. Reason : Cancer is caused by damage to genes regulating the cell division cycle.

1.  (a)

2.  (b)

3.  (c)

4.  (d)

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4
Correct Answer :

(a)


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Assertion : A network of food chains existing together in an ecosystem is known as a food web. Reason : An animal like kite cannot be a part of a food web.

1.  (a)

2.  (b)

3.  (c)

4.  (d)

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4
Correct Answer :

(c)


Explanation :
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Assertion : In plant tissue culture, somatic embryos can be induced from any plant cell. Reason : Any viable plant cell can differentiate in to somatic embryos.

1.  (a)

2.  (b)

3.  (c)

4.  (d)

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Correct Answer :

(b)


Explanation :
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Assertion : Escherichia coli, Shigella sp. and Salmonella sp. are all responsible for diarrhoeal diseases. Reason : Dehydration is common to all types of diarrhoeal diseases and adequate supply of fluids and electrolytes should be ensured.

1.  (a)

2.  (b)

3.  (c)

4.  (d)

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4
Correct Answer :

(b)


Explanation :
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Assertion : Deforestation is one main factor contributing to global warming. Reason : Besides CO2, two other gases methane and CFCs are also included under green house gases.

1.  (a)

2.  (b)

3.  (c)

4.  (d)

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4
Correct Answer :

(b)


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Assertion : An organism with lethal mutation may not even develop beyond the zygote stage. Reason : All types of gene mutations are lethal.

1.  (a)

2.  (b)

3.  (c)

4.  (d)

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Correct Answer :

(c)


Explanation :
No Explanation available for this question
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