DNA/RNA/Protein Synthesis

The diagram shows some of the steps in protein synthesis?

The section of DNA being used to make the strand of mRNA is known as a

• carbohydrate

• gene

• ribosome

• chromosome

Which base is normally used in the synthesis of RNA but not in the synthesis of DNA?

• adenine

• uracil

• guanine

• cytosine

A DNA nucleotide may contain

• deoxyribose, cytosine, and a lipid

• deoxyribose, thymine, and a phosphate group

• ribose, uracil, and a polypeptide

• ribose, adenine, and thymine

Which statement best describes a chromosome?

• it is a gene that has thousands of different forms

• it has genetic information contained in DNA

• it is a reproductive cell that influences more than one trait

• It contains hundreds of genetically identical DNA molecules

The genetic code of a DNA molecule is determined by a specific sequence of

• ATP molecules

• sugar molecules

• chemical bonds

• molecular bases

DNA is able to control cellular activities most directly by regulating the process of

• meiotic division

• protein synthesis

• active transport

• selective breeding

Which event takes place first during DNA replication?

• a single stranded RNA molecule is formed

• transfer RNA links to an amino acid

• free nucleotides are bonded together in the correct sequence

• the DNA molecule "unzips" along weak hydrogen bonds

In a portion of a gene, the sequence is T-C-G-A-A-T. What is the complimentary DNA sequence?

• A-C-G-T-A-A

• A-C-G-U-U-A

• A-G-C-T-T-A

• U-G-C-A-A-U

Which statement best describes the relationship between cells, DNA, and proteins?

• Cells contain DNA that controls the production of proteins.

• DNA is composed of proteins that carry coded information for how cells function.

• Proteins are used to produce cells that link amino acids together into DNA.

• Cells are linked together by proteins to make different kinds of DNA molecules

Which of the following nucleic acids combines directly with amino acids?

• DNA, only

• Messenger RNA, only

• Transfer RNA, only

• DNA, messenger RNA, transfer RNA