A student is identifying the molecule of heredity. Which molecule should they choose?
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Answer: DNA
DNA is the molecule of heredity; the other options are nitrogenous bases.
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A student is identifying the molecule of heredity. Which molecule should they choose?
Answer: DNA
DNA is the molecule of heredity; the other options are nitrogenous bases.
To explain how DNA is copied, describe DNA ___ and the roles of key ___.
Answer: Blank 1: replication. Blank 2: enzymes.
DNA replication is the copying process, and explaining it includes the roles of key enzymes.
A student wants to differentiate DNA from RNA. Which two aspects should the student compare?
Answer: Structure and function
Differentiating DNA and RNA calls for comparing both their structure and their function.
Which of these are nitrogenous bases in DNA? Select all that apply.
Answer: Adenine · Cytosine
Adenine and cytosine are two of DNA's four nitrogenous bases. Glucose and phosphate are not nitrogenous bases.
What is the overall shape of DNA?
Answer: A double helix
The double helix describes DNA’s overall structure; the other choices name features considered within that structure.
A structural feature of DNA named for its sugar and phosphate components is the ___ .
Answer: Blank 1: sugar-phosphate backbone.
The sugar-phosphate backbone is a named feature of DNA’s double helix structure.
Which type of bond is named as having a role in DNA’s double helix structure?
Answer: Hydrogen bonds
Hydrogen bonds are the bonds specifically named as having a role in the double helix structure.
Besides knowing the names of DNA’s four nitrogenous bases, what must you understand to explain how the bases are paired?
Answer: The base-pairing rules in DNA.
Identifying the bases and explaining the rules governing their pairing are distinct parts of understanding DNA.
Which two features should be included when describing DNA’s double helix structure? Select both.
Answer: The sugar-phosphate backbone · Hydrogen bonds
The sugar-phosphate backbone and hydrogen bonds are both named in connection with the double helix structure. Replication and comparison with RNA are separate topics.
Which of the following are nitrogenous bases in DNA? Select all that apply.
Answer: Adenine · Guanine
Adenine and guanine are nitrogenous bases. The sugar-phosphate backbone and hydrogen bonds are distinct features discussed in relation to DNA's structure.
The four nitrogenous bases in DNA are adenine, guanine, ___, and thymine.
Answer: Blank 1: cytosine.
Cytosine completes the list of four nitrogenous bases alongside adenine, guanine, and thymine.
Which concept addresses how nitrogenous bases pair in DNA?
Answer: Base-pairing rules
Base-pairing rules address the pairing of nitrogenous bases in DNA; the other choices name separate structural or biological topics.
How many nitrogenous bases are identified in DNA?
Answer: Value: 4 (exact, no tolerance).
Adenine, guanine, cytosine, and thymine are the four nitrogenous bases identified in DNA.
A student is identifying nitrogenous bases involved in DNA base-pairing rules. Which three of the following should they select?
Answer: Adenine · Cytosine · Thymine
Adenine, cytosine, and thymine are nitrogenous bases; hydrogen bonds and the sugar-phosphate backbone are not bases.
A student needs to identify the molecule of heredity. Which molecule should they choose?
Answer: DNA
DNA is identified as the molecule of heredity.
A student is outlining the basic process of DNA replication. What kind of agents should they include as having roles in that process?
Answer: Key enzymes.
An outline of DNA replication should account for the roles of key enzymes.
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