The test tubes in the photograph contain Benedict’s solution and two unknown substances that have been heated. What do the results indicate for each substance?
What will be an ideal response?
The substance in the right hand test tube is a carbohydrate with carbonyl groups that reacted with Benedict’s solution to produce a positive test. The left hand test tube shows a negative Benedict’s test, so the substance in that test tube is NOT a carbohydrate with carbonyl groups.
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What is the purpose of dialysis treatments?
A. To constrict blood vessels to prevent death from dehydration B. To keep the airways open so one can breathe C. To replenish oxygen in the bloodstream D. To detoxify dangerous chemicals in the bloodstream
Which of the following is true of gene regulation?
1.Different genes are present in different tissues, leading to differentiation. 2.Operons are made up of promoters, enhancers, and exons. 3.In prokaryotes, gene regulation is predominantly a response to environmental conditions. 4.Histones bind to promoter regions of genes and act to inhibit methylation.
In the central nervous system messages are coordinated and integrated and instructions are sent via nerves to ______.
Fill in the blank(s) with the appropriate word(s).
Dental caries are caused by the production of ________ by bacteria in the mouth
Fill in the blank(s) with correct word