Students plan to conduct an experiment to measure the effect of light on photosynthesis in aquatic plants. The materials for this experiment are:30 g sodium bicarbonate (baking soda) Three 250 mL beakers filled with water Small aquatic plants, such as elodea Three large funnels with narrow tip Three large test tubes 100-watt lamp Procedure:1. Dissolve 10 ml of sodium bicarbonate into each beaker.2. With the help of an adult, cut the stem of each plant with a sharp razor blade 3. Place 5 plants under each funnel, then attach the test tubes to the top of each funnel. 4. Label the beaker setups as A, B, and C.- A is placed 10 cm. from the light source-B is placed 20 cm fram the light source-Is placed 30 cm from the light source 5. Set a timer for 10 minutes, then measure the displacement of the water of the top of the test tube This is the volume of oxygen produced 6. Conduct three trials of this experiment. Your experimental setup will look like this Part 3 Based on these results, predict what would happen if the test tube was placed 50 cm away from the light source. What would happen if the test tube was placed 1 cm away from the light source?

transcription is a process in which information is rewritten. it is something our cells must do, in a more specialized and narrowly defined way. in biology, transcription is the process of copying out the dna sequence of a gene in the similar alphabet of rna. it needs to happen in the nucleus because that's where the dna is. dna is always inside the nucleus unless the cell is dividing.

transcription is the first step in gene expression, which involves copying a gene's dna sequence to make an rna molecule. transcription is performed by rna polymerases. it has three stages: initiation, elongation, and termination. rna molecules must be processed after transcription in eukaryotes.

explanation:

long version:

the protein synthesis consists two processes which are, transcription and translation. transcription takes place in the nucleus. it uses dna as a template to make an rna molecule. rna then leaves the nucleus and goes to a ribosome in the cytoplasm, where translation occurs. transcription is the first part of the central dogma of molecular biology: dna → rna. it is the transfer of genetic instructions in dna to messenger rna (mrna). during transcription, a strand of mrna is made that is complementary to a strand of dna.  

these three stages are:

  initiation: in which   is the beginning of transcription.occuring 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.

    elongation: in which 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.

    termination: in which 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.