DNA contains the hereditary code for:   A. Carbohydrate structures in the body B. protein structures in the body C. Both A & B D. Neither A or B

Proteins serve as the "machinery" for the living cells. What type of molecules serve as blueprints and allow a cell to correctly produce its' proteins? 10. A. Carbohydrates B. Genes C. Gametes D. Lipids

Which of the following is NOT a function of proteins in the human body? A. Energy source B. Signal transduction C. Insulation D. Catalyzing metabolic reactions

Transcription and translation take place in the ________ and ________, respectively. a. nucleus; cytoplasm b. nucleolus; nucleus c. nucleolus; cytoplasm d. cytoplasm; nucleus

The first nucleotide in every mRNA molecule ever produced is _________ and the first amino acid of every amino acid chain ever produced is ________ a. guanine; alanine b. uracil; lysine c. cytosine; threonine d. adenine; methionine

In a DNA molecule, a sugar, phosphate, and nitrogenous base are collectivley referred to as   A. DNA   B. RNA   C. a nucleotide   D. a codon

Which of the following play an important role in synthesis of DNA/RNA: a.B-12 b.Folic acid c.Sodium d.a, b

Explain why scientists preferred proteins as the source of genetic material over DNA.   A. DNA seemed too simple of a molecule compared to proteins   B. Proteins are made up of combinations of 20 different amino acids compared to DNA's 4 bases. The larger number seemed more likely to account for all the variety and diversity in organisms.   C. Scientists knew more about proteins than they did DNA.   D. All of the answers are correct explanations.

The role of transfer RNA (tRNA) is to match a codon (3 bases) in mRNA sequence to:   A. An amino acid   B. A peptide bond   C. An R group   D. A start codon

Describe how a single mutation in the DNA of an allele for a gene can cause a disease. How might this understanding be used to treat or cure a disease in a person?