Table 2: Diffusion Tests Step 4: Test for
Diffusion of Starch
Step 7: Test for
Diffusion of Glucose
[Not Observed]
Color of Solution Initial Color: Clear
in Dialysis Tube Color After 15 Minutes: Black
Color of Solution Initial Color: Yellow
in Beaker Color After 15 Minutes: Yellow
Initial Color: Light Blue
Color After 15 Minutes: Red
Analysis:
diffused though the semipermeable membrane.

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.

1)

i))the process of preparing food by green plants in the presence of sunlight is called photosynthesis.

ii) leaf is the site for photosynthesis.

iii) it takes place as,

6h2o+6co2=c6h12o6+602

a. 35°c

b. 25°c

c. 10°c

d. 40°c