What proteins are used in active transport?

Long-period comets come from the oort cloud particles in earth’s atmosphere material from the asteroid belt the kuiper belt

Amino acids contain the elements carbon, hydrogen, oxygen, nitrogen, and sometimes sulfur. of the 20 amino acids found in humans, 11 are called "nonessential" because they can be manufactured by the body when needed. which elements in these 11 amino acids are commonly obtained from the metabolism of sugar molecules?

An organism is found that has the following traits: • has a backbone • has lungs • can reproduce on land what kingdom does this organism most likely belong in? a. animalia b. plantae c. prostisa d. fungi