Which of the following types of inhibitors is(are) likely to bind to the active site of an enzyme? Select all correct choices
A. an irreversible inhibitor
B. a competitive inhibitor
C. a non-competitive inhibitor
Answer Key: A,B
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These are the primary cellular sites for the extraction of energy from organic compounds:
1.Golgi bodies 2.ribosomes 3.mitochondria 4.lysosomes 5.endoplasmic reticula
Many weeds have become resistant to the herbicides that were once used to control them. Which of the following statements best explains this observation?
A. Natural selection has acted on the genetic variability in the weeds’ genomes, enabling plants that have herbicide resistance to reproduce more successfully. B. The weeds have evolved to become different species. C. The herbicides have evolved and are no longer effective against the weeds. D. Continental drift has caused the evolution of weed resistance in the herbicides.
What are the two types of symbiotic relationships in plants?
A) Bacteria in root nodules, fungi in mycorrhizae B) Bacteria in mycorrhizae, fungi in root nodules C) Bacteria in root nodules, fungi in root hairs D) Bacteria in root hairs, fungi in root nodules
Answer the following questions true (T) or false (F)
1. Some species of mosses have pollen that does not have to move through water to reach an egg. 2. Endosperm is the nutritional tissue found within a seed. 3. A single type of pinecone is responsible for the production of both pollen and eggs.