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Breathing and Exchange of Gases
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Breathing and Exchange of Gases
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25 Questions

1. Which stages of cell division do thefollowing figures A and B representrespectively? Fig. A Fig. B [2010]
2. Lampbrush chromosomesduring [1996]
3. Transpiration is least in [1988]
4. The exchange of gases in the alveoliof the lungs takes place by [1998]
5. Which one of the following organs inthe human body is most affected due toshortage of oxygen? [1999]
6. In cell cycle - DNA replication takesplace in [1996 - 2000]
7. A bacterium divides every 35minutes. If a culture containing 105cells per ml is grown for 175 minutes - what will be the cell concentration perml after 175 minutes? [1998]
8. Segregation of mendelian factor (Aa)occurs during [1990]
9. Air is breathed through [1994]
10. In alveoli of the lungs - the air at thesite of gas exchange - is separated fromthe blood by
11. Number of chromatids at metaphaseis [1992]
12. The complex formed by a pair ofsynapsed homologous chromosomes iscalled [NEET 2013]
13. The process of migration of chlorideions from plasma to RBC and ofcarbonate ions from RBC to plasma is[1999]
14. Microtubule is involved in the [1998]
15. Colchicine is employed to diploidizea haploid cell as it [1996]
16. Which two of the following changes(a-“d) usually tend to occur in the plaindwellers when they move to highaltitudes (3 - 500 m or more)? (i) Increasein red blood cell size (ii) Increase in redblood cell production (iii) Increasedbreathingrate(iv)Increaseinthrombocyte count Changes occurringare: [2010]
17. During gamete formation - theenzyme recombinase participates during[2012]
18. Which one of the followingstructures will not be common tomitotic cells of higher plants? [1997]
19. Breakdown product of haemoglobinis [1988]
20. Best material for the studymitosis in laboratory is [2002]
21. What is vital capacity of our lungs?
22. Best stage to observe shape - size andnumber of chromosomes is [1994]
23. How many mitotic divisions areneeded for a single cell to make 128cells? [1997]
24. Given below is the representation ofa certain event at a particular stage of atype of cell division. Which is thisstage? [2012]
25. Meiosis I is reductional division.Meiosis II is equational division due to[1988]