Which of these statements about DNA is true
DNA is too similar to use for grouping organisms
Proteins signal the cells to make DNA
All animals have DNA
DNA is a protein
All animals have DNA.
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The statement "All animals have DNA" is true. DNA (Deoxyribonucleic acid) is a molecule found in the cells of all living organisms, including animals. It carries the genetic information that determines the structure and function of an organism.
The statement that is true about DNA is:
"All animals have DNA."
Now, let me explain how you can determine the correctness of each statement:
1. "DNA is too similar to use for grouping organisms": This statement is false. DNA is commonly used for grouping and studying organisms because it carries genetic information. Scientists can compare DNA sequences to determine the relatedness and evolutionary history of different organisms. By examining the similarities and differences in DNA, they can understand how species are related and classify them accordingly.
2. "Proteins signal the cells to make DNA": This statement is false. DNA is responsible for providing instructions to cells to produce proteins, not the other way around. Proteins, which are encoded by DNA, have various functions in the cell, including signaling and regulating cellular processes.
3. "All animals have DNA": This statement is true. DNA (deoxyribonucleic acid) is a molecule that contains the genetic instructions for the development, functioning, and reproduction of all known living organisms. This includes animals, plants, bacteria, fungi, and other organisms.
4. "DNA is a protein": This statement is false. DNA is not a protein; rather, it is a nucleic acid. Proteins are made up of amino acids, while DNA consists of nucleotides. DNA provides the information necessary for building proteins and controlling various aspects of cellular processes.