Unlike most chromosomes you studied, polytene chromosomes can be observed in con

Question

Unlike most chromosomes you studied, polytene chromosomes can be observed in condensed form during a) interphase b) mitotic division c) cytokines d) S phase only e) G1 phase only Which statement(s) regarding polytene chromosomes is (are) true? a) the DNA of the polytene chromosomes undergoes many rounds of replication without subsequent strand separation b) they are much larger than normal somatic cell chromosomes c) they can be found in salivary glands in the larvae of certain flies d) only b and c are true e) a, b and c are true Polytene chromosomes are composed of 1,000-5,000 DNA strands arranged in a precise parallel alignment. a) true b) false A puff within a polytene chromosome _____ a) results from a local uncoiling of the DNA strands b) is a manifestation of a high level of gene activity c) is a result of endomitosis d) a and b are true e) a, band care true The basic structure of a nucleotide includes _____. A) a nitrogenous base, a pentose sugar, a phosphate group B) methionine and stop codons C) mRNA and DNA D) amino acids E) phosphorus and sulfur Considering the structure of double-stranded DNA, which kind of bonds hold one complementary strand to the other? A) ionic B) covalent C) van der Waals D) hydrogen E) phosphodiester The overall charge of a DNA molecule is _____. (A) negative due to high content of phosphate groups (B) negative due to high content of hydrogen bonds (C) positive due to high content of nitrogenous bases (D) positive due to low content of acidic components (E) must be neutral because two strands with the same (F) of charge would repel each other Arrange the steps of DNA isolation in proper order: I. ethanol extraction, II. homogenization III. adding protease, IV. cell lysis, a) II, IV, III, I b) II, IV, I, III c) I, IV, III, II d) I, II, III, IV

Explanation / Answer

Ans

36 Option a is the right answer

37. option e is the right answer i.e a, b, c are true

38.b false

39 option D is the right answer a b c are true

40. Option A is the right answer

41 Option D is the right answer

42 Option A is the right answer

43 Option a is the right answer

Related Questions

Navigate

• Browse (All)
• Browse U
• Subjects

---

---

Integrity-first tutoring: explanations and feedback only — we do not complete graded work. Learn more.