Enzymes speed chemical reactions by

A. Decreasing amount of energy needed to start a reaction

B. Increasing the amount of energy needed to start a reaction

C. Adding heat to the reaction

D. Removing heat from the reaction

Which of the following statements about organelles is NOT true? A) Each organelle carries out only one role in the life functions of the cell. B) Each organelle carries out functions similar to the way organs function in a large organism.

Which two ions are responsible for the uninterrupted maintenance of the resting potential across the nerve membrane?

What is a chain of nucleotides joined together by hydrogen bonds between the phosphate group of one nucleotide and the deoxyribose sugar of another nucleotide?

is it bad that a kid secretly put a drug in my drink and i drunk it what do i do? am i a drug man now?

Most of Brazil has a warm climate due to which of the following? A. latitude B. elevation C. proximity to lakes D. air and water currents

Which is located at the beginning of a gene? terminator mRNA intron promoter

During which moon phase do spring tides occur?

Most organisms (including you) break down organic compounds to obtain energy and nutritional building blocks. In contrast, chemolithotrophs are prokaryotes that obtain energy through the oxidation of inorganic compounds.

What triggers the endometrial lining to release from the uterus when no pregnancy occurs after ovulation?

Assume that life on Earth began 3.5 billion years ago. To the nearest percent, how much of this time have anthropoids been living?