Question

A student has drawn an enlarged portion of a dna "ladder" model to show two of the nucleotides in greater detail (in the same orientation as they would occur in the ladder model). Which two nucleotides did the student draw?

Answer 1

The student either drew the base-pairing showing adenine and thymine or guanine pairing with cytosine.

Further Explanation:

The nucleic acid makes the DNA. The nucleic acid is made up of nucleotides. Each nucleotide is made up of a phosphate group, deoxyribose, and a nitrogenous base. Gene is defined as the linear sequence of the nucleotides that are mainly encoded for a protein having a particular function. The alleles are defined as the variant type of the gene. DNA is mainly made up of the nucleotides and also contains genetic information in the genes. DNA has mainly four different types of a nitrogenous base  

• Adenine
• Cytosine  
• Thymine
• Guanine

The nitrogenous bases are divided into two groups called the pyrimidines and the purines. The pyrimidines include the thymine and cytosine; the purines are adenine and guanine.The nitrogenous bases in the double helix are bound together according to the base-pairing rule—adenine pairs with thymine (A-T) and guanine pairs with cytosine (G-C). The student either drew the base-pairing showing adenine and thymine or guanine pairing with cytosine.

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Answer Details:

Grade: High School

Subject: Molecular Biology

Chapter: Gene expression

Keywords:

DNA, RNA, concept map, replication, double helical, nucleotides, transcription, proteins, cytosine, adenine, uracil, thymine, together, pairing.

Answer 2

A DNA molecule consists of two stands of nucleotides that wind around each other like a twisted ladder with a phosphate and sugar backbone. The  nitrogenous bases are divided into two groups called the pyrimidines and the purines. The pyrimidines include the thymine and cytosine, the purines are adenine and guanine.  The nitrogenous bases in the double helix are bound together according to the base pairing rule. Adenine pairs with thymine (A-T) and guanine pairs with cytosine (G-C). The student either drew the base pairing showing adenine and thymine or guanine pairing with cytosine.