Bio help will thank and mark brainliest if correct (30 POINTS)

If a chemical reaction catalyzed by an enzyme is being carried out, and there is a sudden, drastic decrease in temperature, what is most likely to happen next?

Enzyme activity will decrease, and the reaction will proceed very slowly, or possibly not at all.
Less heat will be lost to the environment, and the reaction will take place more efficiently.
The reaction will proceed more quickly since the activation energy is decreased.

The reaction rate will decrease and eventually return to normal as the enzyme adapts to the temperature change.



While the average human is able to hold his or her breath for approximately one minute, a whale can dive for over 30 minutes without returning to the surface. Which of the following correctly describes this difference?

Whales need less energy than humans.
Whales gather energy from their environment better than humans.
Whales are able to conserve oxygen better than humans.
Whales have cells that produce energy differently than humans.

All eukaryotic cells have a cytoskeleton, including plant cells, which have cell walls as well. What does the cytoskeleton in a plant cell do that the cell wall cannot?

It acts as a framework inside the endoplasmic reticulum and keeps it from collapsing.
It helps keep the organelles in place and directs their movement as needed.
It provides energy and helps to move molecules throughout the cell.
It keeps the DNA safely enclosed in the nucleus and holds the nucleus together.