A researcher has discovered a new ligand that can pass through the cell membrane and bind to a receptor in the nucleus. Which of the following statements is FALSE regarding this ligand?
a) This ligand is likely a steroid.
b) This ligand is likely nonpolar.
c) This ligand likely plays a role in transcription.
d) This ligand likely has a similar structure to cholesterol
e) This ligand likely binds to a transmembrane receptor.
Answer: e) This ligand likely binds to a transmembrane receptor.
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Plants have the ability to measure day length due to the presence of ____ in their tissues
Fill in the blank with the appropriate word.
Reduced O2 (5% to 10%) and increased CO2 (8% to 10%) produce an environmental condition that best suits which type of organism?
a. Aerobes b. Anaerobes c. Capnophiles d. Microaerophiles
In order to elucidate the Calvin cycle, Calvin and his colleagues used two-dimensional paper chromatography to
analyze the presence of different molecules under different conditions. What did they conclude from the accumulation of RuBP when CO2 levels were low?
a. RuBP only reacts with CO2 in the sunlight. b. RuBP only reacts with CO2 when concentrations of ATP are low.
c. RuBP is the first substrate to react with CO2. d. RuBP is the last substrate to react in the Calvin cycle. e. CO2 serves as a non-competitive inhibitor of rubisco.
Describe the mechanisms that lead to multiple births. What will be an ideal response?