Unit 2 Flashcards
Who is known for discovering the double helix structure of DNA?
James Watson and Francis Crick
What technique did Rosalind Franklin use to study DNA?
X-ray crystallography
True or False: Chargaff’s rules state that the amount of adenine equals the amount of thymine in DNA.
True
Fill in the blank: The two strands of DNA are held together by __________ bonds.
hydrogen
What did Erwin Chargaff contribute to the understanding of DNA?
He discovered the base pairing rules.
Which scientist proposed the idea of the DNA double helix before Watson and Crick?
Linus Pauling
What are the four bases found in DNA?
Adenine, Thymine, Cytosine, Guanine
True or False: DNA is a type of protein.
False
What is the significance of the base pairing in DNA structure?
It allows for the accurate replication of DNA.
Who first suggested that DNA carries genetic information?
Frederick Griffith
Multiple choice: Which scientist’s work was crucial in understanding the helical structure of DNA? A) Watson B) Franklin C) Mendel D) Darwin
B) Franklin
What is the shape of the DNA molecule?
Double helix
Fill in the blank: The sugar in the backbone of DNA is __________.
deoxyribose
Who were awarded the Nobel Prize for their discovery of the DNA structure?
James Watson, Francis Crick, and Maurice Wilkins
True or False: DNA can be found in both the nucleus and the cytoplasm of a cell.
False
What does the term ‘antiparallel’ refer to in the context of DNA structure?
The two strands run in opposite directions.
What role did Maurice Wilkins play in the discovery of DNA structure?
He provided X-ray diffraction images of DNA.
Multiple choice: Which scientist used X-ray diffraction to capture images of DNA? A) Watson B) Franklin C) Wilkins D) Chargaff
B) Franklin
True or False: The discovery of DNA structure was a collaborative effort among several scientists.
True
What year was the structure of DNA published by Watson and Crick?
1953
What is the primary function of DNA?
To store and transmit genetic information.
Fill in the blank: The complementary base pairs in DNA are __________ and __________.
Adenine and Thymine; Cytosine and Guanine
Which scientist’s research laid the groundwork for the concept of DNA as the genetic material?
Avery, MacLeod, and McCarty
What is the importance of the hydrogen bonds in DNA?
They allow the strands to separate during replication.
