Biology, 22.09.2020 14:01 skylarleannjone2751
A class is using marshmallows to demonstrate different chemicals' properties by heating and cooling the
marshmallows. Which
student is practicing bad laboratory safety?
O Neka is cleaning up the melted marshmallows after recording her observations.
O Nikkos checks his glassware for imperfections before using them.
O Kenneth is using the Bunsen burner to roast the marshmallows and eat them.
O Kojo threw the used marshmallows into the trash can after his instructor told him to do so.
Answers: 1
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What two fields of study provide the core information that is used to classify organisms?
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Biology, 21.06.2019 22:00
There are specialized producers that live in warm water vents deep in the ocean. these producers do not per-form from photosynthesis, but instead perform a similar process with iron and other chemicals. why do you think these producers use this process instead of photosynthesis?
Answers: 1
Biology, 21.06.2019 23:30
Compare and contrast region e in the illustration above with region d. describe the physical characteristics of each region.
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Biology, 22.06.2019 00:00
Mouse liver cells were homogenized and the homogenate subjected to equilibrium density-gradient centrifugation with sucrose gradients. fractions obtained from these gradients were assayed for marker molecules (i.e., molecules that are limited to specific organelles). the results of these assays are shown in the figure. the marker molecules have the following functions: cytochrome oxidase is an enzyme involved in the process by which atp is formed in the complete aerobic degradation of glucose or fatty acids; ribosomal rna forms part of the protein-synthesizing ribosomes; catalase catalyzes decomposition of hydrogen peroxide; acid phosphatase hydrolysis monophosphoric esters at acid ph; cytidylyltransferase is involved in phospholipid biosynthesis; and amino acid permease aids in transport of amino acids across membranes. a) name the marker molecule and give the number of the fraction that is most enriched for each of the following cell components: lysosomes; peroxisomes; mitochondria; plasma membrane; rough endoplasmic reticulum; smooth endoplasmic reticulum.
Answers: 3
A class is using marshmallows to demonstrate different chemicals' properties by heating and cooling...
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