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DNA and RNA
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Which nitrogenous base is NOT found in DNA?
Uracil
A DNA nucleotide is composed of what ELEMENTS? there are 5....
Carbon Hydrogen Oxygen Nitrogen Phosphorus
which molecule has the shape of a double helix? RNA DNA ADP ATP
DNA
A sequence of nucleotides that directs the synthesis of a product, such as protein is... a gene a trait heredity polymerase
GENE
Deoxyribosenucleic acid molecules serve as a template for the synthesis of molecules of.... mRNA Amino Acids Carbohydrates Lipids
Messenger RNA
TRUE or FALSE? The double helix model of DNA was developed by Hardy and Weinberg
FALSE> WATSON AND CRICK
TRUE or FALSE? Urea is a compound found in DNA and RNA?
FALSE.... that's a bi-product of an organelle....
TRUE or FALSE? BOTH RNA and DNA are present in the nucleus of the cell?
TRUE!
TRUE or FALSE? DNA and RNA may contain the four bases adenine, cytosine, guanine, and thymine?
FALSE
Which is a structural component of a DNA nucleotide? A. Glucose B. an Enzyme C. Deoxyribose D. an Amino Acid
Deoxyribose
In humans there are 23 pairs of chromosomes. One pair of the 23 are sex chromosomes. The other 22 pairs are known as... Autosomes homozygotes heterozygotes Centromeres
Autosomes
Which element is present in all nucleic acids, but not in amino acids? A. Hydrogen B. Phosphorus C. Oxygen D. Iron
Phosphorus
Which element is present in all nucleic acids, but not in amino acids?
Phosphorus
Who were the two scientists that proposed the double helix arrangement of the DNA molecule?
Watson and Crick
True or False? RNA has a double helix shape?
FALSE.... that's DNA
True or False? DNA directs the production of enzymes?
True
Knowledge of the structure of DNA is important in the study of life because DNA... stores food? transmits genetic information? transmits chemical energy? stores enzymes?
Transmits genetic information
Which structure pairs with adenine nucleotide during the formation of messenger RNA?
Phosphate-ribose sugar-Uracil
Based on nucleic structure, in what way do DNA molecules differ from RNA molecules?
RNA contains Uracil and DNA does not
In a DNA molecule, the number of Guanine nucleotides will most likely equal the number of ___________ nucleotides?
Cytosine
The genetic material in living organisms is composed of organic molecules known as.... Starches? Lipids? Nucleic Acids? Fatty Acids?
Nucleic Acids
All nucleotides of DNA and RNA contain a.... Uracil base? Thymine base? Ribose sugar? Phosphate group?
Phosphate group
Which two bases are present in equal amounts in a double-stranded DNA molecule? Cytosine and Thymine? Adenine and Thymine? Adenine and Uracil? Cytosine and Uracil?
Adenine and Thymine
Which nitrogenous base is normally present in DNA but absent in RNA?
Thymine
In molecules of DNA, which nitrogenous base bonds with Adenine?
Thymine
A strand of DNA consists of thousands of smaller, repeating units known as...
Nucleotides
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