A scientist is investigating a hormone response in rose bush stems by removing the apical meristems of the main stems. What is the most likely result of this experiment and what hormone is responsible?
A. Flowers will turn yellow and fall off under the influence of auxin.
B. Lateral buds will develop under the influence of cytokinin.
C. New apical buds will develop under the influence of auxin.
D. More leaf buds will appear along the main stems under the influence of auxin.
E. Larger, deeper roots will form under the influence of cytokinin.
Answer: B
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What was one of the pieces of evidence most critical to the discovery of DNA structure?
A. Its composition of four different nucleotides. B. The discovery of its semi-conservative mode of replication. C. An X-ray diffraction pattern suggesting a double helix shape. D. The backbone containing sugar-phosphate linkages. E. The hydrogen bonding between different nucleotides.
The oxidative energy system fuels the body over long periods of exercise, and can use molecules other than glucose for energy. What are those other molecules?
a. ATP and GTP b. creatine phosphate and dihydrogen oxide c. dihydrogen oxide and nitric oxide d. fats and proteins e. glucose and fructose
When DNA ligase is used to combine a human fragment with a plasmid, the result is a(n) redundant plasmid
__________________ Indicate whether the statement is true or false.
Which base-pairing system is correct?
A. A to G; T to C B. A to T; G to C C. A to C; G to T D. A to T or C; G to C or A E. A to T or G; G to C or A