Proteins and Nucleic Acids — Unit test Answers

A Venn diagram can be used to compare and contrast nucleic acids.Which characteristic would be correctly found in B?

Which statement describes how enzymes and substrates are related?

Which reaction is exothermic?

Read the passage about bird food and bird watching. Noted scientist Dr. Elsa Birde described the effect of adding a mixture of dried apples and raisins to the previous feed of sunflower seeds, millet, thistle seed, and cracked corn in bird feeders in her yard. Over three years, Dr. Birde observed that the new mixture increased the number of songbirds at her feeders, especially during the months of April and May. As she has done for several years, Dr. Birde recorded, at the same time each day, the number of birds at each of her four feeders. She noted that the third year using the mixture coincided with the largest increase. There was a twenty-five percent increase in the number of songbirds over times when this mixture was not used. Dr. Birde also noted that in the third year she used a specific ratio of the ingredients, carefully measuring, which she had not done in previous years. The third year also had a warmer than normal spring, and a construction project began in a neighborhood near Dr. Birde’s. Dr. Birde is now going to produce this formula for sale and advertise to customers that they may see the same twenty-five percent increase in songbirds at their feeders.Dr. E. Birde, Journal of Scientific Bird FeedingWhich scientific claim can be made?

Lactose (milk sugar) is a carbohydrate that is formed by combining galactose and glucose. Which term best describes this molecule?

Where does a peptide bond form?

Dr. Katherine Pollard, a biostatistical researcher, recently changed the method that she used to compare human and chimpanzee DNA. Her research showed that the differences between the two species’ DNA are in segments called switches, which turn certain genes on or off. What is the most likely outcome of Dr. Pollard’s research?

Which component is affected when a catalyst is added to a chemical reaction?

What scientific knowledge about macromolecules is a direct result of Gerardus Johnannes Mulder’s 1838 discovery?

Which food contains mostly polysaccharides?

The diagram shows a simple lipid.What type of lipid is shown?

Which would a scientist most likely do before asking a question that could lead to a scientific experiment?

Which recent discovery led to a new understanding of how genetic mutations increase the risk of cancer?

How does a catalyst influence a chemical reaction?

Which most likely is a causal relationship?