During transcription from DNA to RNA, which base occurs only in RNA

a. uracilB. thymineC. adenineD. cytocine

The center of the DNA molecule, the rungs of the ladder, are composed of

Which statement describes an example of a positive feedback loop?

Which sentence describes an object that has kinetic energy? A seagull sits on top of a fence post. A beach ball is round. A radio has batteries with stored chemical energy. A boat sails across the ocean.

What functional groups define the two different ends of a dna strand?

Why are mushrooms important to the food chain? They recycle nutrients into the ecosystem. They produce food energy for other living things. They recycle oxygen into the atmosphere. They consume excess herbivores in the ecosystem.

How many molecules are formed from the cleavage of glucose during the first step of glycolysis?

A 64 N object is lifted to a height of 5 m. What is the potential energy of this object?

Contamination of food items by other living organisms is a known as

Minerals are naturally occurring, inorganic solids that have a crystalline structure and a definite chemical composition. True or False

What does it mean for an organism to be anaerobic? a. It is poisoned by water. b. It lives in salty environments. c. It is poisoned by oxygen. d. It produces large amounts of oxygen.

Chorionic villi sampling (CVS) is a test to determine whether fetal cells have genetic abnormalities and can be performed as early as 8 weeks. Chorionic villi cells are removed using a small tube that is passed through the cervix.