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46. Which of the following statements regarding, , oe, , chloroplast is/are incorrect?, [NCERT Pg. 135-136], (a) A thylakoid is made up of many grana., , (b) Outer chloroplast membrane is more, permeable., , (c) Stroma has enzymes for the synthesis of, proteins., , (d) Chloroplast pigments are present in, stroma., , (1) (a) and (d), (3) (b) and (d) (4) (d) only, , Mechanical support, motility and, maintenance of the shape of the cell, all, these functions in a cell is due to, , [NCERT Pg. 136], , (2) (a), (b) and (c), , are some of the longest cells., [NCERT Pg. 127], The, cell and provides a strong structural support, , to prevent the bacterium from bursting or, [NCERT Pg. 128], , determines the shape of the, , Collapsing., , In some prokaryotes like cyanobacteria,, there are other membranous extensions into, the cytoplasm called which contain, pigments. [NCERT Pg. 129], , 48., , 49., , , , (1) Plasma membrane (2) Cytoplasm, (3) Cell wall (4) Cytoskeleton, , In eukaryotic flagella, one of the tubules of, each peripheral doublets is connected with, central sheath by [NCERT Pg. 137], , (1) Central hub (2) Central bridge, (3) Linker tubule (4) Radial spoke, , The cell organelle that has cart wheel, appearance made up of, , [NCERT Pg. 137-138], (1) Eleven doublet peripheral microtubules, (2) Nine peripheral and two central fibrils, (3) Nine peripheral triplet fibrils, , (4) Seven peripheral doublet and two, , central singlet fibrels, @ Thinking in Context, , Several ribosomes may attach to a single, mRNA and form a_ chain called, [NCERT Pg. 129], , In human beings, the membrane of the, erythrocyte has approximately A, , percent protein and B_ percent lipids., , [NCERT Pg. 131], , Many molecules can move briefly across the, membrane without any requirement of, energy and this is called, , [NCERT Pg. 132], , 50., , , , Match the following columns’ w.r.t, chromosomes and select the correct, , option. [NCERT Pg. 139], Column! Column Il, a. Centromere (i) Disc shaped, structure, b. Satellite (ii) Primary, constriction, Kinetochore (iii) Basic protein, d. Histone (iv) Small fragment, due to, secondary, constriction, , (1) a(iii), b(iv), c(i), d(ii), (2) a(ii), b(iv), c(i), d(iii), (3) a(ii), b(i), c(iv), d(iii), (4) a(iii), b(i), (iv), d(ii), , The smooth endoplasmic reticulum is the, major site for synthesis of, [NCERT Pg. 133], , Hydrolytic enzymes optimally active at the, , pH. [NCERT Pg. 134], The vacuole is bound by a single membrane, called [NCERT Pg. 134], , 10. The mitochondria divide by, , 11., , [NCERT Pg. 135], Amyloplasts store, , [NCERT Pg. 135]