a) What type of bond is involved in complementary base pairing?

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b) On what site of the large ribosomal subunit does the second tRNA attach during translation? --------------------------------------------------------------------

a) The type of bond involved in complementary base pairing in DNA is called hydrogen bonding. In DNA, there are four nucleotide bases: adenine (A), thymine (T), guanine (G), and cytosine (C). In the DNA double helix, A always pairs with T through two hydrogen bonds, while G always pairs with C through three hydrogen bonds. These hydrogen bonds help maintain the stability and structure of the DNA molecule.

To find this answer, you can study the basics of DNA structure and base pairing. Understanding the concept of hydrogen bonding and the complementary base pairing rules in DNA will provide you with the information you need.

b) The second tRNA attaches to the A (aminoacyl) site of the large ribosomal subunit during translation. Translation is the process where the genetic information in mRNA is used to synthesize proteins.

To find this answer, you can study the process of translation and the different sites on the ribosome. The A site is where the incoming aminoacyl-tRNA binds during the protein synthesis process, and it is located on the large ribosomal subunit. Understanding the steps of translation and the roles of each site on the ribosome will help you identify where the second tRNA attaches.

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