A scientist is researching the germination rates of different Arabidopsis thaliana mutants. The seeds from one of her mutants always fails to germinate, even if she exposes them to red light
Interestingly, she notices that all of her mutant seeds contain Pr but never Pfr
(even after several days under red light). In these plants, what might the mutation affect?
A. The mutation increases the conversion of
Pr to Pfr.
B. The mutation inhibits the conversion of Pr
to Pfr.
C. The mutation inhibits the conversion of Pfr
to Pr.
B
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The first DNA comparison studies between humans and chimpanzees relied on which of the following?
A. The more complementary two strands of DNA are, the higher the melting point. B. The more complementary two strands of DNA are, the lower the melting point. C. DNA from different organisms won't combine to form a double helix. D. Proteins from chimpanzees would have a higher melting point than similar proteins from humans. E. Proteins from chimpanzee would have a lower melting point than similar proteins from humans.
A preexisting, ancestral character is also known as a(n) ________
A) apomorphy B) plesiomorphy C) synapomorphy D) clade
The use of antibiotics caused the mutation that produced methicillin-resistant Staphylococcus aureus (MRSA)
Indicate whether the statement is true or false
A protein being synthesized by a cell for export would follow which pathway in the cell?
A. ribosome to cell membrane B. ribosome to lysosome to endoplasmic reticulum to Golgi apparatus to cell membrane C. ribosome to endoplasmic reticulum to Golgi apparatus to cell membrane D. ribosome to Golgi apparatus to endoplasmic reticulum to cell membrane