Question Video: Recalling the Structure of a DNA Molecule | Nagwa Question Video: Recalling the Structure of a DNA Molecule | Nagwa

Question Video: Recalling the Structure of a DNA Molecule Science • Third Year of Preparatory School

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Fill in the blank: DNA (deoxyribonucleic acid) is the genetic material found in our cells. DNA is made up of two strands that twist around each other to form a _ . Long molecules of DNA coil into structures called chromosomes. Chromosomes are found in the nucleus of our cells.

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Video Transcript

Fill in the blank. DNA, deoxyribonucleic acid, is the genetic material found in our cells. DNA is made up of two strands that twist around each other to form a blank. Long molecules of DNA coil into structures called chromosomes. Chromosomes are found in the nucleus of our cells.

Inside most of our cells is the genetic material DNA, or deoxyribonucleic acid. The structure of DNA was a mystery for a long time. Eventually, we discovered that DNA is made up of two strands. Imagine a ladder, where each arm of the ladder is a DNA strand. Each strand is made up of many repeating parts called nucleotides. These join together to form the rungs or steps of the ladder. Nucleotides on one strand can fit together with nucleotides on the other strand. This is what keeps the two strands stuck together. In DNA, these two strands are twisted around each other. We call this shape a double helix.

Therefore, in the statement “DNA is made up of two strands that twist around each other to form a blank,” the correct answer to fill in the blank is double helix.

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