About this Study Set
This study set covers Genetics through
25 practice questions.
A series of precise questions focusing on dates, numerical data, and historical figures in the field of genetics. Every question includes the correct answer so you can learn as you go — pick any format above to get started.
Questions & Answers
Browse all 25 questions from the
Hard Genetics Fact-Check study set below.
Each question shows the correct answer — select a study format above to practice interactively.
1
In which year did Oswald Avery, Colin MacLeod, and Maclyn McCarty publish their paper proving that DNA is the substance that causes bacterial transformation?
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A
1944
-
B
1952
-
C
1941
-
D
1953
2
How many base pairs are contained in the approximate haploid human genome length as determined by the Human Genome Project?
-
A
2.5 billion
-
B
3.2 billion
-
C
4.1 billion
-
D
1.8 billion
3
Barbara McClintock was awarded the Nobel Prize in Physiology or Medicine in 1983 for the discovery of what genetic phenomenon, first observed in the 1940s?
-
A
Epigenetic imprinting
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B
Transposable elements
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C
Alternative splicing
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D
Telomere shortening
4
The Hershey-Chase experiment, which confirmed DNA as the genetic material using bacteriophages, was conducted in which year?
-
A
1950
-
B
1953
-
C
1952
-
D
1948
5
What is the exact number of chromosomes typically found in a normal human diploid somatic cell?
6
In Gregor Mendel's 1866 paper 'Experiments on Plant Hybridization', how many distinct pea plant traits did he meticulously document and cross-breed?
7
James Watson and Francis Crick published their seminal paper on the double-helix structure of DNA in the journal Nature on what specific date?
-
A
April 25, 1953
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B
February 28, 1953
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C
May 15, 1953
-
D
March 7, 1953
8
How many codons are there in the standard genetic code?
9
The first genetically modified organism, a bacterium resistant to antibiotics, was created by Herbert Boyer and Stanley Cohen in which year?
-
A
1971
-
B
1973
-
C
1975
-
D
1979
10
Frederick Sanger developed the chain-termination method for DNA sequencing in which year?
-
A
1977
-
B
1980
-
C
1974
-
D
1982
11
What is the total number of amino acids standardly encoded by the genetic code for protein synthesis?
12
In 1902, Walter Sutton proposed the Chromosomal Theory of Inheritance; in which year did Theodor Boveri independently arrive at similar conclusions?
-
A
1902
-
B
1904
-
C
1906
-
D
1908
13
The International Human Genome Sequencing Consortium officially announced the completion of the 'finished' version of the human genome sequence in what year?
-
A
2001
-
B
2003
-
C
2005
-
D
2007
14
How many hydrogen bonds are present between a Guanine-Cytosine base pair in DNA?
15
Marshall Nirenberg and Heinrich Matthaei identified the first codon (UUU for phenylalanine) in which year?
-
A
1961
-
B
1959
-
C
1963
-
D
1965
16
What is the approximate percentage of the human genome that consists of coding sequences (exons)?
17
The enzyme DNA polymerase I was first isolated by Arthur Kornberg in which year?
-
A
1955
-
B
1957
-
C
1959
-
D
1961
18
In humans, the mitochondrial genome consists of how many base pairs?
-
A
16,569
-
B
12,450
-
C
20,100
-
D
8,200
19
Which scientist discovered the 'transforming principle' in Streptococcus pneumoniae in 1928?
-
A
Oswald Avery
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B
Frederick Griffith
-
C
Alfred Hershey
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D
Martha Chase
20
The polymerase chain reaction (PCR) technique was invented by Kary Mullis in which year?
-
A
1981
-
B
1983
-
C
1985
-
D
1987
21
Thomas Hunt Morgan won the Nobel Prize in 1933 for his work on which model organism?
-
A
Caenorhabditis elegans
-
B
Drosophila melanogaster
-
C
Mus musculus
-
D
Arabidopsis thaliana
22
How many rings does a purine base have in its chemical structure?
23
In 1941, George Beadle and Edward Tatum proposed the 'one gene-one enzyme' hypothesis based on experiments with which organism?
-
A
Neurospora crassa
-
B
Saccharomyces cerevisiae
-
C
Escherichia coli
-
D
Zea mays
24
The Human Genome Project was officially launched by the U.S. government in which year?
-
A
1988
-
B
1990
-
C
1992
-
D
1994
25
How many stop codons exist in the standard genetic code?
