Stroma in the chloroplasts of higher plants contains
1. light-independent reaction enzymes
2. light-dependent reaction enzymes
3. ribosomes
4. chlorophyll
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyMiddle lamella is mainly composed of
1. hemicellulose
2. muramic acid
3. calcium pectate
4. phosphoglycerides
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPlasmodesmata are
1. lignified cemented layers between cells
2. locomotory structures
3. membranes connecting the nucleus with plasmalemma
4. connections between adjacent cells
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyCytoskeleton is made up of
1. calcium carbonate granules
2. callose deposits
3. cellulosic microfibrils
4. proteinaceous filaments
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyKeeping in view the 'fluid mosaic model for the structure of cell membrane, which one of
the following statements is correct with respect to the movement of lipids and proteins
from one lipid monolayer to the other (described as flip-flop movement)?
1. Both lipids and proteins can flip-flop
2. While lipids can rarely flip-flop, proteins cannot
3. While proteins can flip-flop, lipids cannot
4. Neither lipids, nor proteins can flip-flop
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyPolysome is formed by
1. several ribosomes attached to a single mRNA
2. many ribosomes attached to a strand of endoplasmic reticulum
3. a ribosome with several subunits
4. ribosomes attached to each other in a linear arrangement
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyThe two subunits of ribosome remain united at a critical ion level of
1. copper
2. manganese
3. magnesium
4. calcium
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyVacuole in a plant cell:
1. is membrane-bound and contains storage proteins and lipids
2. is membrane-bound and contains water and excretory substances
3. lacks membrane and contains air
4. lacks membrane and contains water and excretory substances
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyIn germinating seeds fatty acids are degraded exclusively in the
1. proplastids
2. glyoxysomes
3. peroxisomes
4. mitochondria
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyWhich one of the following is not a constituent of cell membrane ?
1. Cholesterol
2. Glycolipids
3. Proline
4. Phospholipids
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology