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Chapter 17: Q. 17.120 (page 616)

Why are there no base pairs in DNA between adenine and guanine or thymine and cytosine? (17.3)

Short Answer

Expert verified

Two purines and two pyrimidines combined would just take up too much room in the region between the two strands.

Step by step solution

01

Step 1:Given information

We have to find out the why are there no base pairs in DNA between adenine and guanine or thymine and cytosine.

02

Step 2:Explanation

Two purines and two pyrimidines would take up far too much room to fit between the two strands. Only adenine and thymine, as well as cytosine and guanine, may form hydrogen bonds in that region.

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Most popular questions from this chapter

The following sequence is a portion of the DNA template strand:

TGT GGG GTT ATT

a. Write the corresponding mRNA segment.

b. What are the anticodons of the tRNAs?

c. Write the three-letter and one-letter abbreviations for this segment in the peptide chain.

When does the codon AUG signal the start of a protein? When does it code for the amino acid methionine?

Use the molar volume to calculate each of the following at STP:

a. the number of moles of CO2in 4.00 L of CO2 gas.

b. the volume in liters, occupied by 0.420 moles of He gas.

c. the volume, in liters, occupied by 6.40 g of O2 gas.

d. the number of grams of Ne contained in 11.2 L of Ne gas.

A polypeptide contains 36amino acids. How many nucleotides would be found in the mRNA for this polypeptide? (17.5)

If the DNA double helix in humans contains 20% cytosine, what is the percentage of guanine, adenine, and thymine?

See all solutions

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