Question

14 multiple choice 2 points a student investigated the effect of temperature on the germination of radish seeds. he thought that exposure to high temperatures would limit the seeds ability to germinate, since it could denature proteins needed for growth. three hundred seeds were soaked in distilled water for one hour. they were then divided into three groups. one group was placed in an oven set to 450 degrees f for 10 minutes. another group was placed in an oven set to 200 degrees f. the last group was kept at room temperature. the seeds were then planted in three separate flats and given the same amount of water. the flats were placed in a location with a constant temperature of approximately 70 degrees f. each day for two weeks the number of seeds that germinated in each group was recorded. total number of bean seeds germinated after being placed in the oven. 200 degrees 450 degrees room temperature 54 26 88 which group is the control group in this experiment? 200 degrees 450 degrees 0 degrees room temperature 15 multiple choice 2 points what did chargaffs rules state? the amount of nucleotides is equal to the amount of sugar - phosphate backbone the amount of cytosine is always equal to the amount of thymine the amount of purines is equal to the amount of pyrimidines the amount of adenine is equal to the amount of guanine

Explanation:

1. In an experiment, the control group is the one that is not exposed to the variable being tested. Here, the variable is high - temperature exposure, and the group kept at room temperature is not exposed to high temperatures, so it serves as the control.
2. Chargaff's rules state that in DNA, the amount of purines (adenine and guanine) is equal to the amount of pyrimidines (cytosine and thymine).

Answer:

1. D. Room temperature
2. C. The amount of purines is equal to the amount of pyrimidines