21403. Which histone(s) are associated with the linker DNA of a nucleosome?
21404. Each replication bubbles consists of
21405. In DNA replication, one new strand is synthesized complementary to an old (parent) strand and is referred as
21406. In a cesium chloride gradient, DNA labeled with 15N and centrifuged will form a band
21407. The role of primase is to
21408. Deoxyribonucleoside triphosphates, being need in the chain termination methods are
21409. What is the approximate percentage of repetitive DNA sequences in human DNA?
21410. The replication of a linear DNA molecule in a eukaryotic chromosome creates a problem which is reported to be sorted out by
21411. The rapid appearance of HIV-1 strains that are resistant to AIDS drugs is due in part to which of the following property of its reverse transcriptase?
21412. The packing ratio of nucleosomes is about
21413. After one replication in 15N, how many bands should be observed in a cesium chloride gradient?
21414. Reverse transcriptase produces
21415. The nicks or gaps between Okazaki fragments are eventually sealed by
21416. Nucleosome is
21417. The DNA polymerase in bacteria, responsible for DNA synthesis is
21418. In a typical electrophoresis experiment, larger fragments of DNA move more
21419. 30 nm wide helix with five or six nucleosomes per helix is known as
21420. Which of the following is used to determine the appropriate stringency (Wallace rule)?
21421. One hypothesis of DNA replication suggested that the parental DNA molecules are broken into fragments. Both strands of DNA in each of the daughter molecules are made up of an assortment of parental and new DNA. This statement refers to which hypothesis?
21422. DNA polymerases I also has
21423. Without telomerase, what would happen to the ends of chromosomes after each round of replication?
21424. The melting of 40-45 bp at the oriC site of E. coli requires
21425. Overwinding or overtightening of DNA during replication is caused and removed by
21426. How does ethidium bromide interact with DNA?
21427. Number of times the two DNA strands are interwined in circular DNA and is known as
21428. The enzyme responsible for breaking the hydrogen bonds, and thus separating the DNA strands during DNA synthesis is
21429. Which of the following species lack a 'classical' histone H1?
21430. We have a friend ...............plays the piano
21431. The size of a linear DNA fragment in a gel can be estimated by
21432. Which of the following are short nucleotides strands made by DNA polymerase working in the opposite direction of the replication fork?
21433. Which of these drugs bind to DNA and cuts it, producing hydroxyl radicals?
21434. Replication in E. coli is initiated by the generation of short RNA primers using
21435. DNA replication results in
21436. Which enzyme catalyzes the elongation of DNA molecules?
21437. What is the IUPAC code for an A, C, T ambiguity in a nucleic acid sequence?
21438. There is a single origin for DNA replication in bacteria. How many origins of replication are found in the much larger genomes of eukaryotes such as mammals?
21439. Automated DNA sequencing uses the chain termination method
21440. Okazaki fragments occur on the __________ and are bonded together by __________
21441. The RNA primers used to initiate replication in E. coli
21442. An enzyme that recognizes foreign DNA, and results in a cut in that DNA is called
21443. Which of the following is an active site on its single polypeptide chain for DNA Polymerase I?
21444. Which of the following is not a structural motif in DNA binding proteins?
21445. DNA with a G-C content of 50% will melt at approximately
21446. Who's X-ray work aided Watson and Crick in their discovery of the double helix?
21447. DNA replication in eukaryotes occurs only in
21448. Which polymerase is active in DNA repairing
21449. For the DNA replication in eukaryotes, the cell cycle consists of
21450. Which of the following in DNA replication and transcription are common?
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