DNA Structure and Gene Expression
DNA Structure and Gene Expression
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Exam (elaborations)
DNA Structure and Gene Expression Questions and Answers
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---7November 20242024/2025A+
- DNA Structure and Gene Expression Questions and Answers 
Select the characteristics that researchers suspected the genetic material would have prior to the discovery that the genetic material was DNA Answer ability to store information 
accurate replication 
passes from one generation to the next 
 
In the 1940s, scientists had concluded that genetic material was most likely either _____ or _____- Answer DNA or proteins 
 
which of the following are components of a nucleotide? Answer a 5-carb...
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DNA Structure and Gene Expression Questions and Answers
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---16November 20242024/2025A+
- DNA Structure and Gene Expression Questions and Answers 
 
Who discovered the genetic role of DNA and when Answer Frederick Griffith, 1932 
 
What bacteria was used by Griffith Answer Streptococcus Pneumoniae - a bacterium that causes pneumonia 
 
Difference between S strain and R strain Answer S appears smooth because it case a capsule. R appears rough because it lacks a capsule.
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DNA Structure and Gene Expression (Chapter 25) PRACTISE QUESTIONS
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---14November 20242024/2025A+
- DNA Structure and Gene Expression (Chapter 25) 
 
Fill in the blank,"DNA is a polymer of _________.," using the given terms : amino acids, nucleic acids, nucleotides, or proteins. Answer Nucleotides 
 
A nucleotide is built from how many subunits? Answer Three 
 
Fill in the blank," The structure of DNA was determined by_____________," using the given terms :Watson and Crick, Erwin Chargaff, Rosalind Franklin, or Hershey and Chase. Answer Watson and Crick
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DNA Structure and Gene Expression Questions and Answers
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---4November 20242024/2025A+
- DNA Structure and Gene Expression 
 
Purines ** Answ** Double ring structure --> adenine and guanine 
 
Pyrimidines ** Answ** Single ring structure --> thymine and cytosine (and uracil) 
 
How many hydrogen bonds are between A and T? ** Answ** 2 
 
How many hydrogen bonds are between G and C? ** Answ** 3 
 
Can purine be with another purine? ** Answ** No, it is always a purine with a pyrimidine 
 
Strands of DNA are always... ** Answ** antiparallel
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Exam (elaborations)
DNA Structure and Gene Expression Practise Questions
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---9November 20242024/2025A+
- DNA Structure and Gene Expression Practise Questions 
 
Set 1 
1.	Question: Explain the importance of the chromosome manipulation that took place in 1908 in the context of molecular biology. 
o	A) It allowed scientists to understand the structure of DNA 
o	B) It paved the way for genetic engineering and understanding heredity 
o	C) It led to the discovery of RNA and its functions 
o	D) It established the concept of epigenetics 
Answer: A) It allowed scientists to understand the structure of DNA ...
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