Biology 1290B Lecture Notes - Lecture 6: Intron, Radiography, Hydrolysis
50 views2 pages
25 Apr 2016
School
Department
Course
Professor
Document Summary
Griffith (1928) transformation, a change in genotype and phenotype due to the assimilation of a foreign substance (dna) by a cell. The phosphate group of one nucleotide is attached to the sugar of the next nucleotide in line. The result is a backbone of alternating phosphates and sugars, from which the bases project. A large team of enzymes and other proteins carries out dna replication. It takes e. coil less than an hour to copy each of the 55 million base pairs in its single chromosome and divide to form two identical daughter cells. A human cell can copy its 6 billion base pairs and divide into daughter cells in only a few hours. This process is remarkably accurate, with only one error per billion nucleotides. More than a dozen enzymes and other proteins participator in dna replication. Transcription is the dna-directed synthesis of rna: a closer look. Messenger rna is transcribed from the template strand of a gene.
Get access
Grade+20% off
$8 USD/m$10 USD/m
Billed $96 USD annually
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
40 Verified Answers
Class+
$8 USD/m
Billed $96 USD annually
Homework Help
Study Guides
Textbook Solutions
Class Notes
Textbook Notes
Booster Class
30 Verified Answers
Related Documents
Related Questions
1. | In addition to identifying the genetic material, the experiments of Avery, MacLeod, and McCarty with different strains of Streptococcus pneumoniae demonstrated that | ||||||||||
|
2. | In order to show that DNA in cell extracts is responsible for genetic transformation in Streptococcus pneumoniae, important corroborating evidence should indicate that _______ also destroy transforming activity. | ||||||||||
|
3. | Based on what you have learned about the experiments conducted by Griffith and Avery and colleagues with bacteria, which of the following would result in transformation of living R cells? | ||||||||||
|
4. | A-T base pairs in a DNA double helix | ||||||||||
|
5. | If 23 percent of the bases in a sample of double-stranded DNA are adenine, what percentage of the bases are uracil? | ||||||||||
|
6. | The uniform diameter of the DNA structure provides evidence for | ||||||||||
|
7. | If a sequence of one strand of DNA is 5â²-TGACTATC-3â², what is the complementary strand? | ||||||||||
|
8. | What structural aspect of the DNA facilitates dissociation of the two DNA strands for replication? | ||||||||||
|
9. | If the MeselsonâStahl density gradient experiment had resulted in two bands of DNA molecules after only one round of replication, one containing only 15N and the second only 14N, this result would have indicated that replication was | ||||||||||
|
10. | The nucleoside analogue acyclovir, which is used to treat herpes simplex virus (HSV) infections, lacks a 3â² hydroxyl group (âOH). Predict what will happen if the host cell DNA polymerase incorporates a molecule of acyclovir into an elongating strand of HSV DNA. | ||||||||||
|
11. | Which of the following does not demonstrate the stability of the DNA double helix? | ||||||||||
|
12. | What effect would a primase inhibitor have on DNA replication? | ||||||||||
|
13. | To replicate their DNA in a timely manner, most eukaryotic chromosomes | ||||||||||
|
14. | Which statement about DNA replication is false? | ||||||||||
|
15. | In many eukaryotes, there are repetitive sequences called telomeres at the ends of chromosomes. After successive rounds of DNA replication, the _______ strand becomes shorter. In some cells, an enzyme called _______ repairs the shortened strand. | ||||||||||
|
16. | A researcher studies normal human fibroblast cells. They can be maintained in culture but die off after about 30 cell generations. Unexpectedly, a colony of cells continues to survive and divide past 30 generations. Which scenario is most likely true for these cells? | ||||||||||
|
17. | If DNA polymerase III introduces an incorrect nucleotide, what is the first corrective action made by the DNA repair system? | ||||||||||
|
18. | Choose the correct order of the following four events in the excision repair of DNA: (1) Base-paired DNA is made complementary to the template. (2) Damaged bases are recognized. (3) DNA ligase seals the new strand to existing DNA. (4) Part of a single strand is excised. | ||||||||||
|
19. | Six complete cycles of PCR should result in a _______-fold increase in the amount of DNA. | ||||||||||
|
20. | When double-stranded DNA is heated to temperatures above 90°C, it denatures. Denaturation is a process that | ||||||||||
|