Question

of photosgynthesis and your esperience conducting this experiment in our lab to debes A. A release of oxygen from the plant C Absorbance of CO2 by the plant E Absorbance of the liquid in Use your knowledge R Production of starch by the plant D. Production of sugars by the plant 6t. Whicd of the following best eplains changes in the pH of the liquid in the test of oxygen by the plant is a surgical technique that separatos properly during meiosis II. all of the above 62 Karyotype analysis mutagenic B.chromosomes that have failed to segregate is a means of agcats A. D. C is used in prenatal diagnosis to detect E. none of the above chromosomal mutations (defects) in the embryo 63. How many chromosomes does a human gamete(sperm or egg) cell containd. B. 46 D. 23 A. 13 C 33 E none of the above 64. The horse, Equus cabalas, has a total of 64 chromosomes, while the donkey, Equus Asinus, has 62 chromosomes. How many chromosomes would be expected in the somatic (body) tissue of a results from a borse mating with a donkey? B. 63 D. 46 A. 126 C 23 E. None of the above 65. What happens during metaphase of mitosis? A. Chromosomes condense C. B. Chromosomes align on the cell equator (center). D. Chromosomes are pulled apart by spindle fibers. Nuclear membranes break down. E. Cells split in two. 66. What happens during anaphase of mitosis? A. Chromosomes condense C. Chromosomes are pulled apart by spindle fibers. E. Cells split in two. Chromosomes align on the cell Nuclear membranes break down. B. D. equator. 67. What happens during prophase of mitosis? A. Chromosomes condense. C. Chromosomes are pulled apart by spindle fibers. D. Naclear membranes break down. 68. What happens during the interphase- S of mitosis? B. Chromosomes align on the cell both A and D equator. A. Chromosomes condense. C. Chromosomes are pulled apart by spindle fibers. D. Nuclear membranes break down. E. The DNA duplicates (replication) The DNA in prokaryotes (bacteria) is organized into: B. Chromosomes align on the cell equator. 69. A. several chromosomes C. attachments at several points on the cell B. the endoplasmic reticulum D. compact bundles called histones E. a single circular molecule

Answer 1

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61. Absorbance of CO₂ by plants (C).

Note: Carbon dioxide forms carbonic acid in water, which then dissociates into bicarbonate and hydrogen ions. Hence, pH is a measure of hydrogen ion concentration in a solution. This means, carbon dioxide reacts in water leading the either increase or decrease in pH due to respective increase or decrease in hydrogen ion.

62. is used in prenatal diagnosis to detect chromosomal mutations and metabolic disorders in the embryos.

Note: Karyotype tests is used to study the embryos chromosomes to notice the presence of any extra chromosome, missing chromosome or abnormal chromosome.

63. 23 (D)

Note: Cell division during meiosis separates the chromosomes pairs and resulting gametes has only 23 chromosomes each (one copy from each set of chromosome).

64. 63 (B).

Note: A mule takes 32 horse chromosomes and 31 donkey chromosomes to make total of 63 chromosomes.

65.  Chromosomes align on the cell equator (B).

Note: During metaphase, the chromosomes align themselves in the center of the cell. The chromosomes remains joined at the central point called centromere.

66. Chromosomes are pulled apart by spindle fibers.

Note: Spindle fibers becomes short and pull apart the sister chromatids towards opposite end of cell.