Which of the Following Does NOT Describe the Secondary Structure

question 1

Multiple Choice

Which of the following does NOT describe the secondary structure of DNA as proposed by Watson and Crick?

• A) The two strands of the double helix are stabilized by hydrogen-bonding between A and T and between G and C.
• B) The two strands of the double helix run in opposite directions.
• C) The distance between the 1' carbons of the deoxyribose units is the same between the A-T and the G-C base pair.
• D) The phosphate deoxyribose backbones of the helix are on the outside.
• E) The base pairs are stacked on one other with their planes at 180o to the helix axis.

---

Definitions:

ATP

ATP, a molecule responsible for transporting energy throughout cells for metabolic processes.

Phospholipids

A class of lipids that are a major component of all cell membranes as they can form lipid bilayers due to their amphiphilic characteristic.

Phagocytosis

The cellular process of engulfing solid particles by the cell membrane to form an internal compartment known as a phagosome.

Lysosome

An organelle in the cytoplasm containing degradative enzymes enclosed in a membrane, involved in breaking down cellular waste.