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1. Who were the first scientists to describe DNA as a double helix structure?A. Rutherford and CrickB.Mandeleev and WatsonC.Watson and CrickD.Watson and Rutherford2.Which of the following is not a sub-unit of a nucleotide?A. phosphoric acidB. a phosphorus-containing baseC. the sugar deoxyribose or riboseD. all of the above are units that make up a nucleotide3.ATP is composed of all but the following ____A. a ribose 5-sided sugarB. adenineC. three phosphate groupsD. thymine4.How does ATP release energy to drive chemical reactions in the cell?A. the last two phosphate bonds are unstable and easily broken, releasing large amounts of energyB. the last phosphate bond is hydrolyzedC. ATP is changed to ADP and reused laterD. all of the above are correct5.What base is found in RNA but not DNA?A. adenineB. cytosineC. thymineD.uracil
Briefly describe five factors that decrease the stability of an helix. Include examples of specific amino acids with each factor that would act to destabilize a helix.
An amphibian that lives in a swamp has thirty fold more DNA than a human who lives on the forty-eight floor of luxury apartment apartment complex.
Bacteria can cause diseases by using their toxin to interfere with body process. Most Viruses do not encode toxins, cannot overcame body defense. How do viruses cause disease.
Scientists surmise that an early charophyte-like alga is theancestor of land plants. Starting with bryophytes, describespecific features that evolved in this group of plants that allowedfor a move to land.
A neutral variant of feather color in snow geese, called blue phase is caused through an unknown genetic variant. The less common blue phase results from a single dominant gene while common white phase is homozygous recessive.
Gel shows protein A visible in normal cells, without hormone, cytoplasmic fraction and normal cells, with hormone, nuclear fraction. Also in cells lacking protein B, without hormone, nuclear fraction, and cells lacking protein B with hormone, nucl..
In the absence of an inducer molecule, will lac repressor proteins (encoded by the lacI gene) be bound to the lac operon? If so, where will they bind?
Which condition is best described while the ovaries shut down their production of eggs and hormones like estrogens and progesterone approximately 30 years after they started.
You are following an enzyme reaction where a substrate (Acetaldehyde) is reduced to Ethanol using NADH as a source of reductant, and releasing NAD+.
explain the energetic of catalysis in simplest terms.
In the 19th century the prevailing theory of inheritance was the BLENDING THEORY. According to theory of inheritance, crosses between individuals of differing phenotypes would produce F1 progeny.
In the African-American population, sickle cell anemia, a recessive disease, occurs in 1 out of every 500 births.
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