1.)What do enzymes do to the rate of a reaction? Slow them down.
Speed them up.
They do not affect the rate of a reaction.
They sometimes speed up the reaction and sometimes slow it down.

2.)The activation energy is the amount of energy needed to start a reaction. What do enzymes do to the activation energy of a reaction?
Lower it
Raise it
Don't affect it at all
Sometimes lower and sometimes raise

3.)What is a substrate?

A small enzyme.
A large enzyme.
What an enzyme works on.
The products of a reaction.

4.)What is the active site of an enzyme?

Where all inhibitors (no matter the kind) bind.
Where the substrate binds to the enzyme.
Where an enzyme is turned off.
Where an enzyme actively slows down all reactions.

Dna is the genetic material that makes up living things, and folic acid plays an important role in the information of dna. jon wants to study the effect of folic acid on dna formation in microbes. which statement accurately describes the variables in this study

The tasmanian devil, a marsupial carnivore, is facing extinction due to devil facial tumor disease (dftd) which causes bulging cancerous lumps and lesions to erupt around the face and neck — often causing enough deformation to make seeing or eating difficult. dftd has evolved into a contagious cancer, a trait that is unique among cancers. devil mating behavior involves biting around the head and neck, allowing cells from one individual — especially cells from the crumbly dftd tumors — to be transferred to the wounds or face of a new individual. this marsupial was once found across australia, but sea levels rose, isolating the tasmanian population, while the australian population went extinct. what would be an outcome of genetic isolation that is likely to have impacted the spread of dftd? a) reduced territory puts diseased individuals in greater contact with non-diseased ones. b) inbreeding results in less variation in facial features so the cancer is generally fatal. c) genetic isolation has made it difficult for scientists to develop a vaccine against dftd. d) the lack of genetic variation in the immune system of tasmanian devils minimizes resistance to the disease.

Why was mendel's work not accepted at the time? o a. his results were false. o b. he did not repeat his experiments. o c. he did not have any data. o d. his results were surprising,