11996 PPI NO 3. The diagram below represents the pathways of water from the soil into the plant
,
..N
K
D
06096
Film of water
grand soil partide
80oop
(
a
Sail
1
(a) Name the structures labeled K and L.
(b) Explain how water from the soil reaches the structure labeled L.
(c) Name the process by which mineral salts enter into the plant.
(2 ma
(5 ma
4. Stato

bfgfdfdgdg

Explanation:

dgds

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.