Which of the following could have an effect on the expression of a gene? a. the concentration of the end product of a metabolic pathway within a cell b. the number of mrna transcripts that are produced c. the rate at which ribosomes attach to mrna to begin translation d. all of these

What's the waste product of electrons and pyruvate combining in fermentation?  

Which statement is the best summary of the model? a-a series of aerobic and anaerobic reactions take place in cells b- the sun's energy moves through trophic levels in a food chain c-light energy is converted into stored chemical energy plants.d- food molecules are broken down in the cells if living things.

The basic types of tissue in the human body are