Biochem Module 6 Questions and Answers 100% Pass

Biochem Module 6 Questions and Answers 100% Pass In DNA, adenine always pairs with ________. - Thymine - Guanine - Uracil - Cytosine - Thymine DNA is built from which of the following? - Nucleosides - Genes - Purines - Nucleotide - Codons - Nucleotide The double helix of DNA is stabilized mainly by __________. - Ionic bonds - Covalent bonds - Ion-dipole bonds - Hydrogen bonds - Hydrogen covalent bonds - Hydrogen bonds Which of the following pentose sugars is a constituent of DNA? - Xylose - Ribitol - 2-deoxyribose - Arabinose - Ribose - 2-deoxyribose Pyrimidines have ________ ring(s), (each) containing ______ nitrogen(s), whereas purines have ________ ring(s), (each) containing ______ nitrogen(s). - 1; 1; 1; 1 - 1; 2; 2; 2 - 2; 2; 1; 2 - 2; 1; 1; 2 - 2; 2; 1; 1 - 1; 2; 2; 2 Identify the base guanine from among the following structures. 5 NH in rings with a double bonded O Which of the following nucleic acids is responsible for using the encoded genetic information to produce of proteins found in living organisms? - Peptide nucleic acid - Ribonucleic acid - Ribitol nucleic acid - Deoxyribonucleic acid - Glycerol nucleic acid - Ribonucleic acid Identify the complementary bases from the following. - Adenine-Cytosine - Adenine- Thymine - Guanine-Thymine - Guanine-Adenine - Cytosine-Uracil - Adenine- Thymine How many hydrogen bonds are made between G and its complementary nucleotide? - 1 - 2 - 3 - 4 - 5 - 3 The base sequence along one strand of DNA of 5'-GCATGAGCC-3'. What is the sequence of the complementary strand of DNA? - 5'-CTAGTCCGC-3' - 3'-CGTACTCGG-5' - 3'-CTAGTCCGC-5' - 3'-CAGTCAGCT-5' - 5'-CTGACTACG-3' - 3'-CGTACTCGG-5' Which of the following types of RNA functions to carry genetic information from the DNA to ribosome? - mRNA - gRNA - rRNA - snRNA - tRNA - mRNA Which of the following is the set of three sequential nucleotides that encodes for a particular amino acid? - Codon - Anticodon - Allele - Gene - Chromosome - Codon A type of DNA that has a right-handed helix is the __________. - t-form - X-Form - B-form - L-form - Z-form - B-form Which of the following is a second messenger in cells? - FAD - cAMP - AMP - dATP - UTP - cAMP Which of the following acts a coenzyme? - FAD - ATP - AMP - cAMP - GGG - FAD rRNA makes up about _________ percent of ribosomes. - 35 - 65 - 20 - 90 - 15 - 65 The conclusion that G and C are present in DNA in equimolar is credited to ______. - James Watson - Francis Crick - Erwin Chargaff - Both A and B - None of the above - Erwin Chargaff The order of nucleotides in DNA is written __________. to C C to N - 3' to 5' - 5' to 3' - Both C and D - 5' to 3' In the Watson-Crick model for the double helix, which statement is NOT true? - The two strands run anti-parallel to one another - The base-pairing occurs on the inside of the double helix. - The double helix (B form) is right-handed. - Two equally sized grooves that run up the sides of the helix. - The two strands have complementary sequences. - Two equally sized grooves that run up the sides of the helix. In the tRNA, below, the amino acid is attached to which position? A Besides ATP, which other nucleotide is part of energy storage in cells? - ATP - UTP - TTP - CTP - GTP - GTP heterocyclic ring shaped carbon chain which has to have at least one atom that isn't carbon in the ring A major component of RNA but not DNA is: - AMP - GMP - UMP - CMP - TMP - UMP Scientists say that two DNA strands are complementary. Briefly describe what is meant by complementary Show one example in your response. The nucleotide sequences of complementary strands are such that, whenever an A occurs in one strand, there is a T in the other strand with which it can form a hydrogen-bonded base pair. Whenever a C occurs in one strand, a G occurs in the other. A is the base that is complementary to T, and C is the base complementary to G. Briefly describe how noncovalent interactions contribute to the three-dimensional shapes and structures of RNA molecules. Hydrogen bonding in regions of complementarity within an RNA chain can result in the formation of a structure. If no complementary regions exist then an unstructured area will exist within the RNA. In one sentence, identify the most noticeable difference between the A-form of DNA and the Z form of DNA. The Z-form of DNA is left handed while the A-form of DNA is right handed. In nucleic acid chemistry, compounds that contain an organic nitrogen-containing base, a sugar, and phosphate group are called ____A_____. Two purines found in DNA in are _____B____ and ____B____. A pyrimidine found in all RNA but not in DNA is ____C_____. In DNA, the pair ____D_____ is held together by three hydrogen bonds. In DNA, the pentose _____E_______ serves as the monosaccharides. A) nucleotides B) adenine and guanine C) uracil D) C - G E) 2-deoxyribose The monomers of RNA nucleic acids, called nucleotides, consist of three parts. What are those three parts? A base, monosaccharide, and phosphoric acid