chapt06 - Chapter 6-DNA How The Molecules of Heredity...

Info iconThis preview shows pages 1–4. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapter 6—DNA: How The Molecules of Heredity Carries, Replicates, and Recombines Information Fill in the Blank 1. The full chemical name of DNA is _________________. Ans: deoxyribonucleic acid Difficulty: 2 2. The protein, ________, is needed to lay down a segment of RNA complementary to the DNA before replication can begin. Ans: primase Difficulty: 2 3. An origin of replication generally has _______ (how many?) replication forks. Ans: two Difficulty: 2 4. The discontinuous lagging strand on a replication fork consists of _________ fragments that are later ligated together to form one strand of DNA. Ans: Okazaki Difficulty: 2 5. The E. coli chromosome contains _____ (how many?) origin(s) of replication? Ans: one Difficulty: 3 6. A prokaryote lacks a __________ membrane. Ans: nuclear Difficulty: 2 7. Recombination is probably always initiated by _______ of DNA. Ans: nicking Difficulty: 3 8. The _________ strand is synthesized continuously during DNA replication. Ans: leading Difficulty: 2 9. A _____________ enzyme recognizes a specific DNA sequence and is able to cleave the DNA generating either “blunt” or “sticky” ends of the DNA. Ans: restriction Difficulty: 1 10. A virus that infects bacterial cells is called a _____________. Ans: bacteriophage Page 90
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Difficulty: 2 11. The genetic material of some viruses such as φ X174 and M13 is ____________. Ans: single-stranded DNA Difficulty: 3 12. The genetic material of the viruses that cause polio and AIDS is ________. Ans: RNA Difficulty: 3 13. Topoisomerase _________ supercoils by nicking the DNA. Ans: relaxes Difficulty: 2 14. In E. coli , recombination begins at _____ sites where recBCD nicks and displaces a strand. Ans: chi Difficulty: 2 Multiple Choice 15. Which of the following is not true of DNA? A) It is acidic. B) It contains deoxyribose. C) It is found in cell nuclei. D) It contains phosphate. E) It contains proteins. Ans: E Difficulty: 2 16. The molecule of heredity is: A) RNA. B) DNA. C) protein. D) carbohydrate. E) none of the above Ans: B Difficulty: 1 Page 91
Background image of page 2
A) phosphodiesters. B) proteins. C) nucleotides. D) nucleosides. E) polymers. Ans: C Difficulty: 2 18. DNA is localized mainly in the: A) cell membrane. B) endoplasmic reticulum. C) vacuoles. D) chromosomes. E) none of the above Ans: D Difficulty: 2 19. Each nucleotide of DNA is made up of: A) a deoxyribose sugar. B) a nitrogenous base. C) a phosphate. D) a and b only. E) all of the above Ans: E Difficulty: 2 20. The polarity of DNA synthesis is: A) 5' 3'. B) 3' 5'. C) 5' 2'. D) 2' 5'. E) none of the above Ans: A Difficulty: 1 21. In the Hershey and Chase experiment designed to determine the molecule of heredity, what was radiolabeled with 35 S? A) protein
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Image of page 4
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 02/13/2012 for the course BIO GENETIC taught by Professor Binnanger during the Spring '11 term at FAU.

Page1 / 18

chapt06 - Chapter 6-DNA How The Molecules of Heredity...

This preview shows document pages 1 - 4. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online