In DNA, which type of bonding occurs between the nucleotide bases? aA - B and C - D bA - C and T - G cA - G and U - T dA - T and G - C

What does a nucleotide consist of?Protein-phosphate-baseProtein-sugar-baseAmino acid-sugar-basePhosphate-sugar-base2There are four different bases in DNA, which always pair up in a particular way. Which of the following shows the correct complementary base pairing? A-A, C-C, T-T and G-GA-X and G-CT-A and G-CA-G and T-C3What takes place during transcription?DNA unwinds and mRNA copy is mademRNA threads through a ribosometRNA molecules bring amino acids together to form a chainAmino acid chain folds up to form a protein4In which part of the cell does translation take place? RibosomeNucleusMitochondriaCell membrane5Which of the following statements about protein synthesis is incorrect? There are about 20 different amino acidsThe amino acids that make up a protein can be connected in any orderEach group of three bases codes for one amino acidProteins are made up of amino acids6What term describes a change in a gene or chromosome? A switchA mutationA natural selectionAn alteration

How are the nitrogenous bases (A, G, C, T) joined to the DNA backbone?Group of answer choicesThey make covalent bonds with both the deoxyribose and the phosphate.They are covalently bound to the deoxyribose.They are covalently bound to the phosphate group.They interact through ionic interactions with the deoxyribose.They interact through ionic interactions with the phosphate group.

There are four different bases in DNA, which always pair up in a particular way. Which of the following shows the correct complementary base pairing? A-X and G-CT-A and G-CA-A, C-C, T-T and G-GA-G and T-C

During transcription, which of the following shows the correct complementary base pairing of DNA with mRNA?Group of answer choicesA-U and G-CC-A and G-TC-C, G-G, A-A and T-TC-T and A-GA-T and G-C

DNA is constructed ofGroup of answer choicesa single strand of nucleotides with internal hydrogen bonding.two complementary strands of nucleotides bonded A—C and G—T.two strands of nucleotides running antiparallel.two strands of identical nucleotides with hydrogen bonds between them.None of the answers is correct.