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Intro Biology Practice Questions #2 Use the information and the diagram below to answer Numbers 1 through 3. Part of the process of protein synthesis is shown below. The different structures in this process are numbered 1 through 5. _____5. The structure of DNA was discovered in 1953 by ______________. It was found to be a ______________. A. B. C. D. Franklin & Wilkins; double helix Franklin & Wilkins; circular shape Watson & Crick; double helix Watson & Crick; circular shape _____6. 11. Transcription of the DNA sequence, AAGCTGGGA would most directly result in which of the following? A. a sequence of three amino acids, linked by peptide bonds B. a DNA strand with the base sequence TTCGACCCT C. a mRNA strand with the sequence TTCGACCCT D. a mRNA strand with the sequence UUCGACCCU _____1. Structure 2 in the diagram represents a A. ribosome B. mitochondrion C. protein D. chloroplast _____7. A function of a DNA molecule is shown below. _____2. The process shown in the diagram occurs in the A. nucleus B. cytoplasm C. vacuole D. chromosome _____3. Structure 1 is produced in what part of the cell? A. vacuole B. cytoplasm C. mitochondria D. nucleus _____4. Which of the following is correctly matched with its function? A. rRNA – contains codes to make new ribosomes B. DNA – carries the amino acids to the ribosomes C. tRNA – combines with proteins to make up ribosomes D. mRNA – carries genetic codes from nucleus to the ribosomes What process is represented by the diagram? A. B. C. D. mutation translation replication transcription _____8. Which of these would most likely cause a mutation? A. the placement of ribosomes on the endoplasmic reticulum B. the insertion of a nucleotide into DNA C. the movement of transfer RNA out of the nucleus D. the release of messenger RNA from DNA _____9. A base sequence is shown below. ACAGTGC How would the base sequence be coded on mRNA? A. TGTCACG B. GUGACAU C. UGUCACG D. CACUGUA _____12. ATCAGCGCTGGC The above sequence of DNA is part of a gene. How many amino acids are coded for by this segment? A. 4 B. 8 C. 12 D. 20 _____10. _____13. GTA___AA CATGCATT This segment of DNA has undergone a mutation in which three nucleotides have been deleted. A repair enzyme would replace them with A. CGT. B. GCA. C. CTG. D. GTA. _____14. Which series of bases will complete this strand of DNA? A strand of mRNA containing the repeating sequence AAGAAGAAGAAG could code for which of the following amino acid sequences? A. lys–arg–glu–lys B. ser–ser–glu–glu C. lys–arg–lys–arg D. lys–lys–lys–lys ______11. The triplet code of bases for RNA may be represented by all of the following except — A. CGT B. CGA C. CGG D. CGU A. B. C. D. CCTGAT ACTGGC GTAGGC TCAGGG _____15. A segment of a DNA strand has the following bases: TAC GAT What is the complementary strand of DNA? A. B. C. D. UAG CAU TAG CAT ATG CTA AUG CUA _____16. Which of the following is a DNA nucleotide? A. B. C. D. Ribose, adenine, phosphae Ribose, uracil, phosphate Phosphate, deoxyribose, thymine Phosphate, deoxyribose, adenine