Home Insert Draw Layout ew Roma 14 B I U A.. A 51. Fats contain more energy per

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Home Insert Draw Layout ew Roma 14 B I U A.. A 51. Fats contain more energy per gram than carbohydrates or proteins because A) fat molecules contain a lower percentage of carbon atoms B) fat molecules contain a lower percentage of hydrogen atoms C) fat moiecules contain a lower percentage of oxygen atoms D) fat molecules contain a higher percentage of adipose atoms 52. John has type B blood. John's father has type O blood. Mary has type AB blood. Ma mother is type A. The possible blood types of John and Mary's daughters are A) AB only B) B or AB only C) A, B or AB only D) A, B, AB or O 53. Colorblindness (Xb) is X-linked and recessive. Blondie is normal, and not a carrier, but her husband Dagwood is colorblind. If their daughter Cookie marries a normal man, what phenotypes can Cookie expect in her sons? A) all normal B) 1/2 colorblind, 1/2 normal C) all colorblind 54. Professor Hotsuu is studying a desert ecosystem containing fig trees, fig-cating rats, rat- eating snakes, and snake-eating lizards. Which organism in this food chain is considered the top carnivore? A) fig trees B) rat-cating snakes C) snake-eating lizards D) fig-eating rats. 55. If the fig trees in Question #54 produce one million kcal ofenergy, about how much energ would be contained in the population of rat-eating snakes? A) 100,000 kcal B) 50,000 kcal C) 10,000 kcal D) 1000 kcal Here is a list of mRNA codons and their amino acids. Use this information to answer #56 and AAU asparagine AUC- isoleucine CAA -glutamive CAU-histidine CGU-argiineCUU -leucine GCA - alanine GAA-glutamate GAU-asprtate UGU-cysteine GGC-glycine 56. The sequence of amino acids of Arginine-Leucine-Glutamine would be coded by this sequence of bases on mRNA: A) cGuCUUCAA B) CGUGAACUL 57. A sequence of bases on a DNA strand of GAATIACGt would code for this anino acid sequence A) Leucine-Asparagine-Alanine B) Arginine-Asparagine-Alanine C) Alanine-C'ysteine- Histidine D) Leucine-Glutamate-Histidine

Explanation / Answer

51) Answer C: Fats contain more energy per gram than carbohydrates or proteins because fat molecules contain a lower percentage of oxygen atoms. Fats contain less oxygen in proportion to hydrogen and carbon than carbohydrates and proteins.

52) Answer C: The possible blood types of John and Mary's daughters are A, B or AB only. Since, Johns genotype if IBi and Mary's gentotype is IAIB they could possible bear offspring of IAi, IBi, IAIB or IBIB of which blood groups are A, B or AB.

53) Answer B: 1/2 colorblind, 1/2 normal.

Blondie's genotyp is CC and Dagwood's genotype is cY. So, CC x cY ---> Cc and CY, Then Cookie's genotype may be Cc. Now suppose, if Cookie's husband's genotype is cY; Then, Cc x cY ---> Cc:cc and CY:cY. There is 50% chance of their sons being normal or colorblind.

54) Answer C: Snake-eating Lizards will be considered as a top carnivore.

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