Which one of the following cellular parts is correctly described ?

Centrioles - sites for active RNA synthesis

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Ribosomes - those on chloroplasts are larger (80s) while those in the cytoplasm are smaller (70s)

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Lysosomes - optimally active at a pH of about 8.5

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Thylakoids - flattened membranous sacs forming the grana of chloroplasts

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Solution

The correct option is D Thylakoids - flattened membranous sacs forming the grana of chloroplasts
Thylakoids form granum in chloroplast

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Q. The structures that are formed by stacking of organized flattened membranous sacs in the chloroplasts are

Which of the following is true about Chloroplasts?

(i) Chloroplasts are minute oval bodies bounded by a double membrane.

(ii) Their interior contains closely packed flattened sacs called thylakoids.

(iii) There are over 60 chloroplasts in a cell.

(iv) The pigment chlorophyll is contained in the empty spaces of thylakoids.

Choose the correct option regarding the structure of chloroplast based on the statments given.

Statement 1: The fluid part of the chloroplast is the stroma lamellae.

Statement 2: The membranous sacs arranged one above the other form the grana.

Statement 3: The membrane bound structures joining the grana are the stroma.

Q. Name the flattened sac like structures present in the interior of the chloroplasts. What is the colourless substance in which these flattened sacs are present?

Q. The individual flattened stacks of membranous structures inside the chloroplasts are known as

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Which one of the following cellular parts is correctly described ?

The correct option is D Thylakoids - flattened membranous sacs forming the grana of chloroplastsThylakoids form granum in chloroplast

The correct option is D Thylakoids - flattened membranous sacs forming the grana of chloroplasts
Thylakoids form granum in chloroplast