Which statement best describes some protein molecules in a cell?
a)proteins are long, folded chains that can form various cell parts
b)proteins are composed of four different starches that direct cell activity
c)proteins are long, twisted strands of glucose that regulate cells
d)proteins are genetically diverse substances that are synthesized in the nucleus

Elements and compounds are pure substances that cannot be broken down physically into a simpler substance. a physical change doesn’t break the bonds between atoms of a substance or form new ones. compounds can be broken down by a chemical change. a chemical change breaks chemical bonds and/or forms new ones between atoms of a substance. what simple substance would a compound break into? the basic elements that make it up! for example, if you passed a very strong electric current through water you’d break the chemical bonds in water and be left with oxygen and hydrogen. which of the following is an example of a chemical change? a separating water into different glasses b breaking frozen ice cubes with a hammer c running an electric current through water d boiling water to evaporate it on a stove

Awolf pack hunts,kills, and feeds on a moose. in this interactions, the moose is a?

The term autotroph refers to an organism that: a. uses co2 for its carbon source. b. must obtain organic compounds for its carbon needs. c. gets energy from sunlight. d. gets energy by oxidizing chemical compounds. e. does not need a carbon source