Question

A.	beads-on-a-string structure
B.	pyrimidine
C.	proof for the semi-conservative model of DNA replication
D.	number of base pairs per turn of the double helix
E.	biochemical evidence of complementarity
F.	number of nanometers between stacked bases
G.	positive supercoiling
H.	transduction
I.	percentage of adenine in a DNA molecule if the percentage of thymine is 18%
J.	direction of new strand synthesis
K.	involves two hydrogen bonds
L.	site of chemical difference between DNA and RNA
M.	negative supercoiling
N.	radioisotope for labeling DNA
O.	revealed by X-ray crystalography
P.	test for dynamic changes in chromatin structure
Q.	site of actively transcribed genes
R.	double-ring base
S.	'attacks' phosphate group of incoming dNTP
T.	direction of polymerase movement in terms of the template orientation
U.	B-form secondary structure
V.	radioisotope for labeling proteins
W.	involves three hydrogen bonds
X.	transformation
Y.	formed by loops on a protein scaffold
Z.	site of DNA's acidic property
AA.	Barr body
AB.	DNA monomer
AC.	substrate of DNA polymerase
AD.	formed by attractive interactions between chromatosomes
AE.	differential enzymatic digestion of cell lysate
AF.	differential radioisotope labeling of proteins and DNA
AG.	percentage of adenine in a DNA molecule if the percentage of guanine is 18%

Choices-

phosphate group

2'-OH group, deoxyribonucleoside triphosphate, deoxyribonucleotide, adenine, guanine, Chargaff's rules, Avery, McLeod, McCarty experiment, Hershey-Chase experiment, 5'-to-3', 3'-to-5', N-15, S-35, G-C complementarity, change in phenotype due to uptake of foreign DNA, 10, 32, 45 complete helical turns in a 600 bp DNA molecule ,

causes compaction of DNA and promotes strand separation

, 30 nm fiber, 300 nm fiber, euchromatin, heterochromatin ,

DNase I sensitivity, cytosine 

Answer 1

a. beads-on-a-string structure - nucleosome

b. pyrimidine-  cytosine , thymine, uracil

c. proof for the semi-conservative model of DNA replication- messelson stahl experiment

d. number of base pairs per turn of the double helix- 10

e. biochemical evidence of complementarity- Chargaff's rules,

f. number of nanometers between stacked bases

g. positive supercoiling

h.transduction- Avery, McLeod, McCarty experiment,

i. percentage of adenine in a DNA molecule if the percentage of thymine is 18%- 18%

j. direction of new strand synthesis- 5` to 3`

k. involves two hydrogen bonds- Adenine and Thymine

l. site of chemical difference between DNA and RNA- 2'-OH group,

m- negative supercoiling-

n. radioisotope for labelling DNA- N-15

o. revealed by X-ray crystallography- DNA structure

p. test for dynamic changes in chromatin structure-

q. site of actively transcribed genes- euchromatin,

r. double-ring base- purines- adenine, guanine

s. 'attacks' phosphate group of incoming dNTP-

t. direction of polymerase movement in terms of the template orientation- 3`5`

u. B-form secondary structure-

v. radioisotope for labeling proteins- S-35,

w. involves three hydrogen bonds- guanine cytosine complementarity

x. transformation-  change in phenotype due to uptake of foreign DNA

y. site of DNA's acidic property-phosphate group

z. formed by loops on a protein scaffold- heterochromatin

Barr body

DNA monomer- deoxynucleotides