You and your lab partner place 2 g slices of liver into 3 test tubes containing water, vinegar, or baking soda. you add 15 ml of hydrogen peroxide to each and measure the amount of oxygen produced every 30 seconds for 3 minutes. now that you have completed the experiment, you need to graph your results. you decide to make a triple line graph showing the rate of reaction (oxygen produced/30 sec.) for each of the three solutions. on your graph, where should you put the oxygen production?
a) on the y axis because it is the dependent variable
b) on the x axis because it is the dependent variable.
c) on the x axis because it is the independent variable
d) on the y axis because it is the independent variable

A) on the y axis because it is the dependent variable

Explanation:

In a Cartesian plane, the dependent variable will always be placed on the y axis, while the dependent variable will always be on the x axis. Since oxygen production in the experiment shown in the above question is a dependent variable, it must be placed on the y axis. Now let's understand what makes oxygen production a dependent variable.

The dependent variable is one that can be measured and verified, but cannot show results on its own. The precise dependent variable undergoes the action of the independent variable to show results. As you may be asked in the question above, oxygen production in each test tube is a measurable variable that depends on the influence of the 15 ml hydrogen peroxide and its composition (water, vinegar or sodium bicarbonate). For this reason, oxygen production can be considered the dependent variable of this experiment.

step 1: initiation

initiation is the beginning of transcription. it occurs when the enzyme rna polymerase binds to a region of a gene called the promoter. this signals the dna to unwind so the enzyme can ‘‘read’’ the bases in one of the dna strands. the enzyme is now ready to make a strand of mrna with a complementary sequence of bases.

step 2: elongation

elongation is the addition of nucleotides to the mrna strand. rna polymerase reads the unwound dna strand and builds the mrna molecule, using complementary base pairs. there is a brief time during this process when the newly formed rna is bound to the unwound dna. during this process, an adenine (a) in the dna binds to an uracil (u) in the rna.

step 3: termination

termination is the ending of transcription, and occurs when rna polymerase crosses a stop (termination) sequence in the gene. the mrna strand is complete, and it detaches from dna.