Which of the following is a native protein isolated from bacteria and used to soften cotton fibers in jeans and other clothes?
A) Cellulase
B) Amylase
C) Chymosin
D) Penicillin
E) Polymerase
A
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What is the sticky female region of a flower that is specialized for receiving pollen?
a. stamen b. stigma c. anther d. ovary e. endosperm
Which is correct about DNA replication?
A. DNA polymerase can build DNA from scratch. B. DNA is made conservatively. C. The place where the parent DNA becomes unzipped during DNA replication is called the replication fork. D. DNA polymerase adds nucleotides in the 3' to 5' direction. E. The strand made continuously is the lagging strand.
A researcher decides to repeat an experiment and reassess results first established in the 1930's about why plants grow toward light. Which of the following is the best reason for conduction this experiment?
a) plant behavior could have modified due to evolutionary processes since the experiments were first done b) new breeds of plants discovered since the 1930's have not yet been shown to have to same light responses c) shifts in average temperatures produced by global warming may affect plants in ways that are not yet understood d) equipment and methods developed since the 1930's may produce better data and provide mechanistic detail.