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Proj, 1. Who am I ?, a. I am ATP producing factoryMitoclhondria, b. I am single layered, but maintain, cellular osmotic pressure,Vacu ole, c. I support the cell, but I am not cell wall., I have a body resembling net.Endoplasmic, I am chemical factory of the cell. reticulum., e. Leaves are green because of me:, 2 Whatwould have hannened 2 1f, 1., 2., 3., Mitachorde, ne-Chloroplast
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1) Red Blood cells had mitochondria., 0.2.4. What would have happened? If..., (ii) RBC's do not require much of energy because, Ans., des, Cellular aerobic respiration is carried out by, hic de, Mitochondria., f the, they lack almost every piece of cell machinery., i) They carry out energy production through, y di, fermentation., ent, v) In mammals, Mitochondria is lost from RBCS, during erythropoiesis., v) If RBCS had Mitochondria, then they would, have used the oxygen for their use., equ, *(2) There had been no difference between, mitochondria and plastids., am, Ans., (i), Mitochondria is termed as the power house, Cal, of the cell where as plastids are known as the, it, kitchen of the cell., (ii), Plastids occur only in plant and algae cells but, mitochondria are found in all eukaryotic cells., re (iii) If there had been no difference between, mitochondria and plastids, animals cell would, also have varied colours just like the plant cells., *(3) Genes had been absent on the chromosomes., Ans., (i), Each gene occupies a specific portion on a, Because genes provide instructions for, making proteins, and proteins determine the, structure and function of each cell in the body,, it follows that they are responsible for all the, characteristics one inherits., iii) If, chromosome., (ii), genes, then there will be no genetic information of an, organism from one generation to another., had been absent on the chromosomes, ruses
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*(4) Plasma membrane had not been selectively, permeable, Ans., (i) Plasma, membrane, allows only certain, substances to pass through and blocks others, substances from entering the cell., (ii) If it had not been selectively permeable, then, viruses could have also pass through it easily., *(5) Plants lack anthocyanins., Ans., anA, Anthocyanins, compounds, involved in defense against the, damaging effects of UV irradiation in plants., (i), naturally, occurring, are, (ii) They are responsible for the attractive, colours, because of which it attracts insects for, pollination., (iii) Had this not been there the plants would be, only appearing dull, with UV radiation in, plenty of the plants.
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TTEECUL (2L) Criromopiasts (23) Cancer (24) one, Q.1. (A) 2. Who is the odd man among us? Give, reason:, asigonolio to, mitochondria,, *(1) Nucleolus,, Endoplasmic reticulum., Ans. Nucleolus: It is present in the nucleus whereas, others are present in cytoplasm., plastids,, Plastids: They are present only in plant cells while, others are present in all eukaryotic cells., * (2) DNA, Ribosomes, chlorophyll., Ans. Chlorophyll: It is essential for photosynthesis while, others are essential for protein synthesis.
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A) 6. Give any 2 functions of following:, *(2) Plasma membrane, Ans., Separates cell, environment., (i), component from, outer, (ii), Allows selected components to enter the cell., *(3) Cytoplasm, Ans., (i) Cytoplasm is the medium for cellular chemical, reactions., (ii), It protects the cell organelles.
