Genetics Material Test 3

Total Questions:50 Total Time: 60 Min

Remaining:

 

Questions 1 of 50

Question:Characters are transferred from parents to progeny through:

Answers Choices:

DNA

Protein

RNA

Phospholipid

Questions 2 of 50

Question:Hereditary information is indicated by:

Answers Choices:

Sequence of nucleic acids

Position of nucleic acids

Number of nucleic acids

All the above

Questions 3 of 50

Question:To check paternity, the most accurate way of testing is:

Answers Choices:

Sex of persons

DNA printing

Chromosome testing

All the above

Questions 4 of 50

Question:The dye involved in Feulgen reaction to stain DNA is:

Answers Choices:

Janus Green B

Neutral Red

Basic Fuchsin

Haematoxylin

Questions 5 of 50

Question:The acidic characters of DNA and RNA are due to:

Answers Choices:

purine bases

sugar molecules

pyrimidine bases

phosphoric group

Questions 6 of 50

Question:The nitrogenous bases in DNA are:

Answers Choices:

AUGC

UTGC

ATGC

ATUC

Questions 7 of 50

Question:Similarity between DNA and RNA:

Answers Choices:

both have similar sugars

both are genetic materials

both have similar pyrimidines

both are polymers of nucleotides

Questions 8 of 50

Question:How many types of nitrogenous bases are found in nucleic acids?

Answers Choices:

five

two

four

three

Questions 9 of 50

Question:Radio tracer techniques show that DNA is in:

Answers Choices:

Multi-helix stage

Double-helix stage

Single-helix stage

None of these

Questions 10 of 50

Question:Nucleotide on hydrolysis does not give:

Answers Choices:

purines

pyrimidines

pentose sugar

amino acids

Questions 11 of 50

Question:In DNA when AGCT occur their association is as per the following pairs:

Answers Choices:

AG—CT

AC—GT

AT—GC

All are possible

Questions 12 of 50

Question:Which of the following pairs is not correctly matched?

Answers Choices:

Recombinant — DNA formed by joining of DNA segments of DNA from different source

Purine —Nitrogenous bases cytosine, thymine and uracil

ATP —The principal energy carrying compound in the cell

r-RNA —RNA molecules found in ribosomes

Questions 13 of 50

Question:Semiconservative DNA replication was first demonstrated by:

Answers Choices:

Taylor

Watson and Crick

Meselson and Stahl

Khorana

Questions 14 of 50

Question:Taylor demonstrated that DNA replication is semi-conservative in:

Answers Choices:

Vicia faba

Mouse liver cell

Pea nut

He La cell

Questions 15 of 50

Question:Experiments using 15N (heavy nitrogen) to confirm the semiconservative replication of DNA were carried out by:

Answers Choices:

Meselson and Stahl

Hershey and Chase

Beadle and Tatum

Watson and Crick

Questions 16 of 50

Question:DNA polymerase helps in:

Answers Choices:

joining monomers of DNA

proof reading of DNA

renaturation of DNA

splitting of two DNA strands

Questions 17 of 50

Question:The enzyme which can cut molecules of DNA into segments is known as:

Answers Choices:

DNA polymerase

DNA ligase

Restriction enzyme

DNA gyrase

Questions 18 of 50

Question:Ligase is an enzyme required for:

Answers Choices:

Breaking of DNA

Joining DNA bits

Proof reading

Renaturation of DNA

Questions 19 of 50

Question:RNA is:

Answers Choices:

Polynucleoside

Polynucleotide

Carbohydrate

Protein

Questions 20 of 50

Question:Which sugar is responsible for synthesis of RNA molecules?

Answers Choices:

Ribose

Ribulose

Glucose

Deoxyribose

Questions 21 of 50

Question:A riboside is:

Answers Choices:

Ribose + Phosphate + Base

Ribose + Base

Ribose + Phosphate

Base + Phosphate

Questions 22 of 50

Question:Nuclear DNA sends information for protein synthesis through.

Answers Choices:

t-RNA

m-RNA

r-RNA

all of the above

Questions 23 of 50

Question:Triplet codon refers to sequence of three bases on:

Answers Choices:

m-RNA

r-RNA

t-RNA

all of the above

Questions 24 of 50

Question:How many types of RNA polymerase are required in nucleous for RNA synthesis?

Answers Choices:

one

two

three

four

Questions 25 of 50

Question:The most stable RNA in the cell is:

Answers Choices:

r-RNA

s-RNA

t-RNA

m-RNA

Questions 26 of 50

Question:Nongenetic RNA is of:

Answers Choices:

one type

two types

three types

nonfunctional type

Questions 27 of 50

Question:Double stranded RNA is present in:

Answers Choices:

Bacteria

Chloroplast

Reovirus

Mitochondria

Questions 28 of 50

Question:In the coding dictionary, there are 64 codons as:

Answers Choices:

Genetic code is triplet

64 amino acids are to be coded

64 types of t-RNA are present

There are 44 non-sense codons and 20 sense codons

Questions 29 of 50

Question:A degeneracy in genetic code was found by:

Answers Choices:

Khorana

Ochoa

Bernfield and Nirenberg

McClintock

Questions 30 of 50

Question:Genetic code is said to be degenerate because:

Answers Choices:

codons degenerate very quickly

one amino acid is coded by more than one codon

one codon codes for more than one amino acid

none of the above

Questions 31 of 50

Question:Which RNA does not help in protein synthesis?

Answers Choices:

t-RNA

m-RNA

r-RNA

p-RNA

Questions 32 of 50

Question:Protein hydrolyses into:

Answers Choices:

amino acids

nucleic acids

nucleotides

nucleosides

Questions 33 of 50

Question:The genes are responsible for growth and differentiation in an organism through regulation on:

Answers Choices:

Translocation

Transformation

Transduction and translation

Transcription and translation

Questions 34 of 50

Question:The process involved in the RNA formation on the DNA template is:

Answers Choices:

Translocation

Transformation

Transduction

Transcription

Questions 35 of 50

Question:Usually triplet codons are read in the direction:

Answers Choices:

3' to 5'

5' to 3'

Both

None

Questions 36 of 50

Question:A radioisotope used to label proteins differen­tially from nucleic acids is:

Answers Choices:

\(^{{\rm{32}}}{\rm{P}}\)

\(^{{\rm{14}}}{\rm{C}}\)

\(^{{\rm{35}}}{\rm{S}}\)

\(^{{\rm{15}}}{\rm{N}}\)

Questions 37 of 50

Question:What is the amount of DNA in a diploid cell?

Answers Choices:

variable for a given species

constant for a given species

same in all species of plants

same in all species of animals

Questions 38 of 50

Question:Synthesis of m-RNA from DNA is termed:

Answers Choices:

transduction

transfection

transformation

transcription

Questions 39 of 50

Question:Replication is:

Answers Choices:

DNA \( \to \) DNA

DNA \( \to \) RNA

RNA \( \to \) DNA

RNA \( \to \) Proteins

Questions 40 of 50

Question:Prokaryotic DNA is:

Answers Choices:

Double stranded circular

Single stranded circular

Double stranded straight

Single stranded straight

Questions 41 of 50

Question:Semiconservative model of DNA replication was first proposed by:

Answers Choices:

Watson and Crick

Meselson and Stahl

Taylor and Woods

none

Questions 42 of 50

Question:Isotopes used for proving semiconservative replication are:

Answers Choices:

\({{\rm{N}}^{{\rm{14}}}}\) and\({{\rm{P}}^{{\rm{31}}}}\)

\({{\rm{N}}^{{\rm{14}}}}\) and \({{\rm{C}}^{{\rm{14}}}}\)

\({{\rm{N}}^{{\rm{14}}}}\) and \({{\rm{N}}^{{\rm{15}}}}\)

\({{\rm{C}}^{{\rm{14}}}}\)and \({{\rm{P}}^{{\rm{31}}}}\)

Questions 43 of 50

Question:Bacterial transformation was discovered by:

Answers Choices:

Avery et al.

Beadle and Tatum

Robert Brown

Har Govind Khorana

Questions 44 of 50

Question:In a DNA double helix:

Answers Choices:

the single strands are not helical

phosphodiester bonds are oriented towards the interior of the helix

adenine on one strand is hydrogen bonded to thymine on the opposite strand

hydrogen bonds form between a purine and pyrimidine base on the same strand

Questions 45 of 50

Question:Prokaryotic genetic material possesses:

Answers Choices:

neither DNA nor histones

DNA but no histones

either DNA or histones

both DNA and histones

Questions 46 of 50

Question:Nuclease enzyme is capable of:

Answers Choices:

breaking all types of bonds

breaking phosphodiester bond

breaking disulphide bond

removing terminal nucleotide

Questions 47 of 50

Question:Translation is the process in which:

Answers Choices:

DNA is formed on DNA template

RNA is formed on DNA template

DNA is formed on RNA template

Protein is formed from RNA message

Questions 48 of 50

Question:Nucleic acid can be fragmented by the enzyme:

Answers Choices:

ligase

protases

nuclease

polymerases

Questions 49 of 50

Question:The proteins associated with nucleic acids are:

Answers Choices:

albumins

histones

globulins

scleroproteins

Questions 50 of 50

Question:Which of the following scientists was awarded Nobel Prize in 1959 for in vitro synthesis of polyribonucleotides?

Answers Choices:

Ochoa

Nirenberg

Kornberg

Khorana