A researcher found that the wild species of almond trees contains a chemical called amygdalin. This chemical is converted into cyanide inside the human body and can be lethal. The researcher found that a single gene mutation in some of the wild almond trees resulted in a variety that no longer produced the chemical amygdalin. This variety of almond is largely
harvested for human consumption. Based on the study, the researcher claimed that some mutations are beneficial in nature.
Was the claim made by the researcher correct?
•Yes. The mutated variety of almonds was edible.
•No. Not all almond trees produced seeds that were edible.
•No. The mutation did not affect all varieties of almond trees.
•Yes. Almond trees with amygdalin grew only in forests.

The diagram illustrates the activity of vesicles during a cellular process.

Keeping in mind the life cycle of bacteriophages, consider the following problem: during the reproductive cycle of a temperate bacteriophage, the viral dna inserts into the bacterial chromosome where the resultant prophage behaves much like a trojan horse. it can remain quiescent, or it can become lytic and initiate a burst of progeny viruses. several operons maintain the prophage state by interacting with a repressor that keeps the lytic cycle in check. insults (ultraviolet light, for example) to the bacterial cell lead to a partial breakdown of the repressor, which in turn causes the production of enzymes involved in the lytic cycle. as stated in this simple form, would you consider this system of regulation to be operating under positive or negative control?

Monomers are the building blocks of larger molecules, called polymers. for example, proteins are composed of chains of amino acids that are linked together. cellulose is a polymer that makes up plant cell walls. cellulose is made from a chain of c6h10o5 molecules. which monomers are most likely used to produce cellulose? why?