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If a strand of DNA has a nitrogen base sequence 5' - ATTTGC-3', what will be the sequence of the matching strand?
If a DNA double helix is a 100 nucleotide pairs long and contains 25 adenine bases, how many guanine bases does it contain?
The two strands of DNA double helix are held together by ___ the form between pairs of nitrogenous bases.
A nucleotide is composed of an ____
phosphate group, a nitrogen-containing base, and a five-carbon sugar.
Which structure is not a component of a nucleotide?
Sulfhydyl oxygen group
What is combined in the Nucleoside?
Cholesterol is a type of steroid and is?
a component of animal cell membranes, precursor from which other steroids are synthesized
Are cholesterol molecules hydrophobic or hydrophilic?
hydrophobic because it has lots of carbons and hydrogens.
Function of enzymatic proteins?
catalysts, selective acceleration of chemical reactions
Function of defensive proteins?
protection against disease
Function of storage proteins?
support, for example collagen and elastin providing a fibrous framework in animal connective tissue.
Function of transport proteins?
movement, for example motor proteins are responsible for the undulations of cilia and flagella.
What are amino acids linked by?
peptide bonds between amino group and carboxyl acid with loss or removal of a water molecule.
What is the beginning of the amino chain?
N-terminus, the amino end
What is the end of the amino chain?
C-terminus, the carboxyl end
unique sequence of amino acids
twisting and turning of polypeptide backbone; consists of coils and folds in polypeptide chain
determined by interactions among various side chains (R groups_
results when a protein consists of multiple polypeptide chains
bond connecting nucleotides in DNA and RNA composed of alternating sugar-phosphate groups
What are the purines?
What are the pyrimidines?
Cystosine, Thymine, Uracil
What is the top of the poly nucleotide?
5 prime end, phosphate
What is the bottom of a poly nucleotide?
3 prime end, hydroxyl functional group
RNA nucleotides contain more what than DNA nucleotides?
Oxygen, Ribose, the sugar used in RNA, has one more oxygen then deoxyribose, the sugar used in DNA
How does DNA store hereditary information?
Information is stored in the sequence of nitrogenous bases along the DNA polymer.
Which molecule is a nucleotide?
What is true about DNA structure?
The nucleic acid strands in a DNA molecule are oriented antiparallel to each other.
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