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Biology
What happens in the alveoli in the process of gas exchange
Proteases and acrosin are enzymes. How do they function in reproduction? A Their function is unknown. B They direct the sperm to the egg through chemical messengers. C They neutralize the mucous secretions of the uterine mucosa. D They act to break down the protective barriers around the egg, allowing the sperm
Cycadophyta is a group of plants with a small number of extant species, that is nevertheless well known from fossils from the Mesozoic era. Living "cycads" are nearly identical to fossils. What best explains these "living fossils"? A. Biological homology B. Punctuated equilibria C. Phylogenetic niche conservatism D. Passive trends E. Hopeful monsters
A model helps scientists form testable hypotheses. Which hypothesis was tested with the ΔFus3 strain? a. Fus3 is required for formin phosphorylation. b. Fus3 is required for the signal transduction pathway leading to shmoo formation. c. Fus3 induces shmoo formation in mating yeast. d. Mating factor is necessary to initiate the signal transduction pathway leading to shmoo formation.
The enzyme fumarase catalyzes the reversible hydration of fumaric acid to l-malate, but it will not catalyze the hydration of maleic acid, the cis isomer of fumaric acid. This is an example of: A. biological activity. B. chiral activity. C. racemization. D. stereoisomerization. E. stereospecificity.
most deadliest animal???
What is the correct sequence of events in the field of molecular biology? 1.Friedrich Miescher conducted experiments to identify nuclein as the building blocks of life. 2.Gregor Mendel published his results to prove the Laws of Inheritance. 3.James Watson and Francis Crick proposed a model of DNA containing two linear strands of DNA. 4.Frederick Sanger developed a method for sequencing DNA.
Why is genetics different from the other health factors?
which of the follwing is not a characteristic of life
If a DNA segment has thenucleotides AGCCTAA, what would be the nucleotide sequence of the complementary RNA strand?
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