What two parts of a nucleotide do not change throughout the structure of DNA?

Five-Carbon Sugar and Phosphate Group

Five-Carbon Sugar and Nitrogen Base

Phosphate Group and Nitrogen Base

All components remain the same throughout the DNA structure?

Why is DNA important?

it serves as the blueprint for traits of all living things

it is very small and very complicated

because we eat it every day for energy

What are the 4 nitrogen bases?

adenine, thymine cytosine, and guanine

adenine, thymine, cytoplasm, and guanine

adenine, thymine, cytosine, and gylcerol

adenine, thymine, cytosine, and glucose

What determines the code, or information, of a DNA molecule?

the order (sequence) of the nitrogen bases

the shape (structure) of the nitrogen bases

the color of the nitrogen bases

the frequency (number) of nitrogen bases

Which 2 molecules form the sides (backbone) of the DNA ladder?

deoxyribose and a hydrogen bond

What is the relationship between a protein, the cell, and DNA?

DNA controls the production of protein in the cell

DNA is produced by protein which is produced in the cell

Protein is composed of DNA which is produced in the cell

A cell is composed of DNA and protein

DNA Structure

Quiz

•

Other Sciences

•

8th Grade

•

Practice Problem

•

Medium

Used 28+ times

FREE Resource

About this resource

This quiz comprehensively assesses DNA structure knowledge appropriate for 8th-grade life science students. The questions systematically cover the fundamental components of DNA, including nucleotide structure (phosphate group, five-carbon deoxyribose sugar, and nitrogenous bases), complementary base pairing rules (A-T and G-C), and the double helix model. Students must demonstrate understanding of DNA's molecular architecture, from identifying monomers and polymers to recognizing the backbone structure and hydrogen bonding between base pairs. The quiz requires students to apply their knowledge of cellular biology by connecting DNA's location in the nucleus to its function as the genetic blueprint for protein synthesis. Advanced concepts include distinguishing between purines and pyrimidines, understanding the relationship between DNA sequence and genetic information, and applying base-pairing rules to determine complementary strands. This quiz was created by a classroom teacher who designed it for students studying DNA structure in 8th-grade life science. This assessment serves multiple instructional purposes, functioning effectively as a comprehensive review before a unit test, homework assignment to reinforce classroom learning, or formative assessment to gauge student understanding of molecular biology concepts. Teachers can use individual questions as warm-up activities or bell ringers, while the complete quiz provides thorough preparation for standardized assessments. The variety of question formats—from basic recall to application problems—allows educators to differentiate instruction and identify specific areas where students need additional support. This quiz aligns with NGSS standard MS-LS3-1 (Develop and use a model to describe why structural changes to genes may affect proteins) and supports the foundational understanding necessary for high school genetics and molecular biology courses.