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NES General Science (311) Practice Tests & Test Prep by Exam Edge - Topics



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Understanding what is on the NES General Science exam is crucial step in preparing for the exam. You will need to have an understanding of the testing domain (topics covered) to be sure you are studying the correct information.

  • Directs your study efforts toward the most relevant areas.
  • Ensures efficient and adequate preparation.
  • Helps identify strengths and weaknesses.
  • Allows for a focused approach to address gaps in understanding.
  • Aligns your preparation with the exam's expectations.
  • Increases the likelihood of success.
  • Keeps you informed about your field's current demands and standards.
There is no doubt that this is a strategic step in achieving certification and advancing your career.

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NES General Science Exam Blueprint

Understanding the exact breakdown of the NES General Science test will help you know what to expect and how to most effectively prepare. The NES General Science has multiple-choice questions The exam will be broken down into the sections below:

NES General Science Exam Blueprint
Domain Name % Number of
Questions
Nature of Science 19% 19
Physical Science 37% 37
Life Science 25% 25
Earth and Space Science 19% 19

NES General Science - Exam Topics Sample Questions

Which of the following is NOT true about the DNA molecule?

Correct Answer:
it takes the form of a triple helix


the question you are asking about is identifying what is not true about the dna molecule. among the statements provided, the incorrect statement about dna is that "it takes the form of a triple helix." this statement is not accurate because the structure of dna is not a triple helix. instead, dna is well-known for its double helix structure, which was discovered by james watson and francis crick in 1953, with significant contributions from rosalind franklin's x-ray diffraction images.

the correct structure of dna, the double helix, consists of two long strands of nucleotides twisted around each other, resembling a twisted ladder. each strand is composed of a sugar-phosphate backbone and nitrogenous bases that pair specifically: adenine with thymine, and cytosine with guanine. this structure is crucial for the replication of dna and its stability in carrying genetic information.

the other statements regarding dna are true. dna is indeed responsible for determining the shape and structure of living things. it contains the genetic blueprint or instructions for building and maintaining an organism. these instructions are encoded in the sequence of the nitrogenous bases along the dna strands.

additionally, dna is related to chromosomes and reproduction. chromosomes, which are structures within the cell nucleus, are made up of dna wrapped around histone proteins. during cell division and reproduction, chromosomes ensure that dna is accurately replicated and distributed to new cells, which is vital for genetic continuity.

in summary, the statement about dna forming a triple helix is incorrect, making it the false statement among the options provided. the double helical structure of dna is fundamental to its function in genetics, and understanding this structure helps in comprehending how dna works in the context of genetics, reproduction, and biological structure.