Which statement describes the size of the inner planets? a. all the inner planets, except mercury, are large. b. the inner planets are larger than the outer planets. c. all the inner planets are smaller than the outer planets. d. mars is a large planet, while the other inner planets are small.

C-All of the inner planets are smaller than outer planets.

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The right option is; C

All the inner planets are smaller than the outer planets is the statement that describes the size of the inner planets.

The inner planets include Mercury, Venus, Earth and Mars. They are also called terrestrial planets because they have solid rocky surfaces. All the inner planets are much smaller (diminutive) than the outer planets and they are closer to the Sun. Of all the four inner planets, Earth is the largest, while mercury is the smallest. The inner planets have either few moons or no moons and they are chiefly composed of heavy metals such as iron and nickel.

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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.