Genetics Material Test 2

Total Questions:50 Total Time: 60 Min

Remaining:

 

Questions 1 of 50

Question:Genes are made up of

Answers Choices:

histones

hydrocarbons

polynucleotides

lipoproteins

Questions 2 of 50

Question:Who introduced the term nucleic acid'?

Answers Choices:

Miescher

Altmann

Feulgen and Rossenbeck

Robert Brown

Questions 3 of 50

Question:Hershey and Chase demonstrated that DNA and not protein is the genetic material with the help of the radioactive isotopes:

Answers Choices:

Nitrogen-15 and Carbon-14

Sulphur-35 and Phosphorus-32

Iodine-131 and Calcium-45

Iron-59 and Nitrogen-15

Questions 4 of 50

Question:Blender experiments of Hershey and Chase demonstrated that DNA is genetic material in:

Answers Choices:

TMV

Escherichia coli

\({T_2}\) bacteriophage

Diplococcus pneumoniae

Questions 5 of 50

Question:Who among the following scientists developed cytochemical technique for the detection of DNA?

Answers Choices:

Feulgen and Rossenbeck

Watson and Crick

Knoll and Ruska

Beadle and Tatum

Questions 6 of 50

Question:Nucleic acids are made of:

Answers Choices:

Nucleosides

Nucleotides

Amino acids

Proteins

Questions 7 of 50

Question:Which base is not found in DNA?

Answers Choices:

Uracil

Adenine

Guanine

Cytosine

Questions 8 of 50

Question:A nitrogenous base together with a deoxyribose sugar and a phosphate group forms:

Answers Choices:

Amino acid

Nucleotide

Nucleoside

Polypeptide

Questions 9 of 50

Question:A double stranded DNA measures 34 millimicron. How many nucleotide pairs will be present?

Answers Choices:

10

104

100

105

Questions 10 of 50

Question:A nucleoside is:

Answers Choices:

Sugar + phosphate

Purine/pyrimidine + sugar

Purine/pyrimidine + phosphate

Purine/pyrimidine + sugar + phosphate

Questions 11 of 50

Question:AGCT are nitrogen bases of DNA. The pairing is:

Answers Choices:

A—G. C—T

A—T, G—C

A—C. G—T

A—T, G—T

Questions 12 of 50

Question:Duplication of DNA is called:

Answers Choices:

Transduction

Transcription

Replication

Translation

Questions 13 of 50

Question:The coiling of double strands in DNA is:

Answers Choices:

parallel

left handed

symmetrical

right handed

Questions 14 of 50

Question:The process of DNA replication is:

Answers Choices:

dispersive

conservative

semi-conservative

non-conservative

Questions 15 of 50

Question:During DNA replication, the strands separate by:

Answers Choices:

DNA polymerase

Gyrase

Unwindase

Topoisomerase

Questions 16 of 50

Question:Protein helping in opening of DNA double helix in front of replication fork is:

Answers Choices:

DNA gyrase

DNA ligase

DNA topoisomerase

DNA polymerase I

Questions 17 of 50

Question:DNA replication requires:

Answers Choices:

DNA ligase

DNA polymerase

RNA polymerase and translocase

DNA ligase and DNA polymerase

Questions 18 of 50

Question:Pynmidines of RNA are represented by:

Answers Choices:

Thymine and Cytosine

Adenine and Cytosine

Uracil and Guanine

Cytosine and Uracil

Questions 19 of 50

Question:Who established that RNA is the genetic mate­rial?

Answers Choices:

Nirenberg and Holley

Lederberg

Fraenkel Conrat

Griffith

Questions 20 of 50

Question:Which purine base is found in RNA?

Answers Choices:

Uracil

Guanine

Thymine

Cytosine

Questions 21 of 50

Question:In contrast to DNA polymerase. RNA polymerase:

Answers Choices:

synthesizes RNA primer to initiate DNA synthesis

tills the gap between Okazaki fragments

works only in a 5' to 3' direction

edits as it synthesizes

Questions 22 of 50

Question:t-RNA molecules have anticodons that pair complementary to codons in:

Answers Choices:

r-RNA

m-RNA

t-RNA

all of the above

Questions 23 of 50

Question:The type of RNA specifically responsible for directing the proper sequence of amino acids in protein synthesis is:

Answers Choices:

chromosomal RNA

r-RNA

t-RNA

m-RNA

Questions 24 of 50

Question:If the codon of a m-RNA is AUG what should be its anticodon on t-RNA?

Answers Choices:

UAC

TAC

CUA

AUG

Questions 25 of 50

Question:Most abundant RNA in a cell is:

Answers Choices:

r-RNA

m-RNA

t-RNA

Primary RNA

Questions 26 of 50

Question:Ribosomal RNA is synthesized in:

Answers Choices:

Nucleosome

Nucleolus

Ribosome

Lysosome

Questions 27 of 50

Question:The first codon discovered by Nirenberg and Matthaei was:

Answers Choices:

UUU

AAA

GGG

CCC

Questions 28 of 50

Question:In which direction mRNA is synthesized on DNA template?

Answers Choices:

\(5' \to 3'\)

\(3' \to 5'\)

both (1) and (2)

any

Questions 29 of 50

Question:In the process of altering the code in the DNA sequence, the message reversed is:

Answers Choices:

deletion

inversion

translocation

none of these

Questions 30 of 50

Question:An anticodon of t-RNA can recognise more than one codon of m-RNA. It is

Answers Choices:

Wobble hypothesis

Template hypothesis

Gene flow hypothesis

Richmond and Lang effect

Questions 31 of 50

Question:Wobble hypothesis establishes:

Answers Choices:

economy in t-RNA molecules

peptide chain formation

termination of peptide chain

initiation of peptide chain

Questions 32 of 50

Question:Anticodons are present on:

Answers Choices:

r-RNA

t-RNA

m-tRNA

m-RNA

Questions 33 of 50

Question:Through which enzyme can RNA give rise to DNA?

Answers Choices:

Restriction enzyme

DNA polymerase

RNA polymerase

Reverse transcriptase

Questions 34 of 50

Question:DNA is transcribed by some viral RNA using the enzyme:

Answers Choices:

DNA polymerase

Reverse transcriptase

Endonuc lease

Ligase

Questions 35 of 50

Question:Reverse transcriptase is:

Answers Choices:

RNA dependent RNA polymerase

DNA dependent RNA polymerase

DNA dependent DNA polymerase

RNA dependent DNA polymerase

Questions 36 of 50

Question:How many high-energy phosphate-bond equiv­alents are utilized in the process of activation of amino acids for protein synthesis?

Answers Choices:

One

Two

Three

Zero

Questions 37 of 50

Question:Which of the following is not a non-sense codon?

Answers Choices:

UAG

UGG

UGA

UAA

Questions 38 of 50

Question:Thymine is present in which of the following?

Answers Choices:

Ribosomal RNA

Mammalian m-RNA

Prokaryotic m-RNA

t-RNA

Questions 39 of 50

Question:Okazaki fragments appear in the course of:

Answers Choices:

repair of DNA

hybridization of DNA

replication of DNA

all of these

Questions 40 of 50

Question:The central dogma is not applicable in the case of:

Answers Choices:

all plant viruses

all animal viruses

all prokaryotes

retroviruses

Questions 41 of 50

Question:Which of the following amino acids has only one codon?

Answers Choices:

Isoleucine

Tryptophan

Tyrosine

Valine

Questions 42 of 50

Question:Non-sense codon is:

Answers Choices:

UAA

UAG

UGA

All of these

Questions 43 of 50

Question:The number of nucleotide pairs in a complete pitch of Z-DNA is:

Answers Choices:

10

11

12

12.5

Questions 44 of 50

Question:How many base pairs are found in one turn of DNA?

Answers Choices:

11

10

9

12

Questions 45 of 50

Question:Which DNA molecule among the following will melt at lowest temperature?

Answers Choices:

5'-A-A-T-G-C-T-G-C-3'
       3'-T-T-A-C-G-A-C-G-5'

5'-A-A-T-A-A-A-G-C-3'
       3'-T-T-A-T-T-T-C-G-5'

5'-G-C-A-T-A-G-C-T-3'
       3'-C-G-T-A-T-C-G-A-5'

5'-A-T-G-C-T-G-A-T-3'
       3'-T-A-C-G-A-C-T-A-5'

Questions 46 of 50

Question:What is the type of coiling in DNA?

Answers Choices:

Right-handed

Left-handed

Opposite

Zig-zag

Questions 47 of 50

Question:Who discovered reverse transcription?

Answers Choices:

Beadle and Tatum

Temin and Baltimore

Har Gobind Khorana

Watson and Crick

Questions 48 of 50

Question:DNA and RNA are different molecules as:

Answers Choices:

DNA has uracil and RNA has thymine

DNA has thymine and RNA has uracil

DNA has cytosine and RNA has guanine

DNA is micromolecule and RNA is a macromolecule

Questions 49 of 50

Question:Okazaki fragments are:

Answers Choices:

short DNA fragments on the lagging strand

short DNA fragments on the leading strand

the DNA fragment produced due to radia­tion action

the RNA primers required for initiation of DNA synthesis