25 points available
one or more plants could die during the experiment. if that happens, how will you account for it? select the correct answers:

mark an x for that plant in the data table.

write a comment about the plant’s death in your lab notebook.

exclude the plant when you compute the average height of the whole group of plants.

exclude another plant from the other group to balance things out.

Option A, B and C

Explanation:

In an experiment, if some of the plants die during the experiment, then it becomes essential to mark those plants. Marking will ease the work of identification at the end of the experiment.  

However, if at the time of marking, reason for the death of these plants is known then that should also be mentioned side by side in a booklet for later research.  

Now, while calculating the average height of the plants it will be best to remove the number of dead plants from the total number of plants or else disoriented readings will be obtained.

Hence, option A, B and C is correct

the sugar-phosphate backbone forms the structural framework of nucleic acids, including dna and rna. this backbone is composed of alternating sugar and phosphate groups, and defines directionality of the molecule.

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.