WorksheetsBOTANY II
Total questions: 20
Worksheet time: 10mins
The association of histone H1 with a nucleosome indicates that
DNA replication is occurring
the DNA is condensed into a chromatin fibre
the DNA double helix is exposed
transcription is occurring
Spliceosomes are not found in cells of
fungi
animals
bacteria
plants
During DNA replication, Okazaki fragments are used to elongate
the lagging strand towards replication fork
the leading strand away from replication fork
the lagging strand away from the replication fork
the leading strand towards replication fork
If there are 999 bases in an RNA that code for a protein with 333 amino acids, and the base at position 901 is deleted such that the length of the RNA becomes 998 bases, how many codons will be altered
11
33
333
1
The final proof for DNA as the genetic material came from the experiments of
Hershey and Chase
Avery, McLeod and McCarty
Hargobind Khorana
Griffith
If the sequence of bases in the coding strand of a double stranded DNA is 5' GTTCGAGTC 3', the sequence of bases in its transcript will be
5' GACUCGAAC 3'
3' CAAGCUCAG 5'
3' GUUCGAGUC 5'
5' CUGAGCUUG 3'
Which of the following RNAs should be most abundant in animal cell?
tRNA
mRNA
sRNA
rRNA
Taylo conducted the experiments to prove semiconservative mode of chromosome replication on
Vinca rosea
Vinca faba
Drosophila melanogaster
E. coli
DNA-dependent RNA polymerase catalyses transcription on one strand of the DNA which is called
template strand
coding strand
alpha strand
antistrand
The equivalent of a structural gene is
Muton
Cistron
Operon
Recon
A complete of ribosomes attached to a single strand of RNA is known as
polypeptide
Okazaki fragment
polysome
polymer
Which one of the following is the starter (initiator) codon?
UAA
UAG
AUG
UGA
A nucleotide is made up of
sugar, nitrogenous base only
sugar only
phosphate, nitrogenous base only
sugar, phosphate, nitrogenous base only
mRNA constitutes ............... of the total RNA content of the cell
3-5%
10-15%
20-25%
70-80%
The process of transfer of genetic information from DNA to RNA is called
translation
replication
transcription
degeneracy
Which one of the following pairs of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?
Purines... guanine, adenine
Purines.... thiamine, adenine
Pyrimidines.... thiamine, uracil
Pyrimidines....... uracil, cytosine
The DNA molecule
the proportion of adenine in relation to thiamine varies with the organism
there are two strands which run antiparallel one in 5', 3' direction and other in 3', 5'
the total amount of purine nucleotide and pyrimidine nucleotides is not always equal
there are two strands which run parallel in the 5', 3' direction
Which form of RNA has a structure resembling clover leaf?
r RNA
hnRNA
mRNA
tRNA
The double helix model of Watson and Crick is known
C-DNA
B-DNA
Z-DNA
D-DNA
Which one of the following statement is true for protein synthesis (translation)?
amino acids are directly recognized by mRNA
the third base of the codon is less specific
only one codon codes for an amino acid
every rRNA molecule has more than one amino acid attachment site
