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Question

Difference between caretenoid and carotenes. In which type of plastid they are found

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Solution

Dear Student,

Carotenoids are pigments that impart bright red, yellow and orange colour to fruits and vegetables while carotenes are hydrocarbons that are important for photosynthesis.
Carotenes are a type of carotenoids that lack an oxygen molecule in their structure.

These are found in CHROMOPLASTS.

Regards,
Pavithra

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Q. How many statements are correct regarding plastids?

(A) Plastids are found in all plant cells and in euglenoids.
(B) Based on the type of pigments plastids can be classified into chloroplasts, chromoplast, and leucoplasts.
(C) In the chromoplasts fat-soluble carotenoid pigments like carotene, xanthophylls, and others are present.
(D) The ribosomes of the chloroplasts are larger than the cytoplasmic ribosomes.
(E) Leucoplasts are the colorless plastids which store nutrients.

Q. Plastids are cytoplasmic organelles found in plant cells and in certain protists. All plastids have essentially the same structure because
(i) They have to perform the same function.
(ii) They are localised in the aerial parts of plant.
(iii) One type of plastid can differentiate into another type of plastid depending upon the cell requirements.
(iv) All plastids have to store starch, lipids and proteins.
Which of the above mentioned statement(s) is/are correct?

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