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MCAT Biochemistry: DNA Structure and Biotechnology Fundamentals

MCAT Biochemistry: DNA Structure And Biotechnology Fundamentals

Explore the intricate world of DNA and biotechnology tailored for MCAT preparation. This assessment focuses on key biochemical principles and biotechnological applications, enhancing understanding and readiness for medical school...

Questions: 27 | Attempts: 10 | Last updated: Aug 4, 2025

Sample Question 1
Deoxyribonucleic Acid (DNA) have the pentose called ___, where the 2' OH group is replaced by an ___. Ribonucleic Acid (RNA) have the pentose called ___, where both the 2' & 3' groups are OH.

DeoxyriboseHRibose

RiboseHDeoxyribose

RiboseHPentose

DeoxyriboseHRibonucleic

Sample Question 2
What is the difference between a nucleoside and a nucleotide?

Nucleosides are composed of only a sugar molecule with no nitrogenous base, while nucleotides contain both a sugar molecule and a nitrogenous base.

Nucleosides are a 5-carbon sugar pentose, covalently bonded to a nitrogenous base at the C-1' of the sugar Nucleotides are formed when one or more phosphate groups are attached to C-5' of a nucleoside; high energy compounds because of the negative repulsion between the phosphate groups

Nucleosides and nucleotides are terms used interchangeably to refer to the same biological molecule.

Nucleosides always contain three phosphate groups attached to the sugar, while nucleotides do not have any phosphate groups.

Sample Question 3
Which nucleotide bases are classified as purines?

Uracil and Cytosine

PURe As Gold (as A & G are purines) gold wedding rings, need to rings to make a marriage. Adenine & Guanine are purines, & purines have 2 rings in their structure.

Cytosine and Thymine

Guanine and Thymine