Question

eduardo is narrowing the focus of his science fair project and compiling a list of research questions his project can answer. which of the following questions can be answered scientifically?

a which brand of sugar - free popsicle melts the fastest?

b which brand of mp3 player sounds the best?

c which brand of bandage hurts more to remove?

d which brand of orange soda do people prefer?

question 11 (4 points)
(01.01 mc)
which of the following best explains why what we know about cells is called a theory and not a law?

a we do not have enough evidence yet to call cell theory a law.

b we have not reviewed cell behavior enough yet to call it a law.

c cell theory is still changing but may eventually become a law.

d cell theory explains cell behavior where a law would describe it.

question 12 (4 points)
(01.01 mc)
the most basic concepts of cell theory are that cells are the basic units of life and that all living things are made of cells. which answer correctly explains why these concepts are the basis of a theory and not a hypothesis?

a cell theory explains how cells function rather than predicting how they function.

b cell theory does not change and as a result can be accepted as fact.

c cell theory is a prediction based on observation and not a fully accepted idea.

d cell theory remains largely untested rather than being subject to testing.

question 13 (4 points)
(01.02 mc)
which of the following correctly completes the following equation: nitrogenous base + sugar + phosphate group =

a nucleotide

b amino acid

c enzyme

d antibody

question 14 (4 points)
(01.02 mc)
humans are able to produce 20 different amino acids, which have side chains with differing properties. how does the variation in amino acids side chains affect a cell?

a it allows for a wide variety of proteins to be produced that will carry out a wide variety of functions.

b it causes the cell to produce a wider variety of proteins that all carry out the same function within the cell.

c it requires the cell to acquire more energy to accommodate a wider variety of chemical bonds among side chains.

d it results in individual proteins that can each carry out a wide variety of biochemical processes within the cell.

Explanation:

• Question 10: The melting rate of a popsicle can be scientifically measured and tested. Sound quality (MP3 player), pain of bandage - removal, and preference for orange soda are subjective and involve personal opinions.
• Question 11: A theory explains phenomena, while a law describes a natural phenomenon. Cell theory explains cell behavior, not just describes it.
• Question 12: A theory explains how things function. Cell theory explains how cells function, distinguishing it from a hypothesis which is a prediction.
• Question 13: A nucleotide is composed of a nitrogenous base, a sugar, and a phosphate group.
• Question 14: Different amino - acid side chains allow for a wide variety of proteins with different functions to be produced.

Answer:

• Question 10: A. Which brand of sugar - free popsicle melts the fastest?
• Question 11: D. Cell theory explains cell behavior where a law would describe it.
• Question 12: A. Cell theory explains how cells function rather than predicting how they function.
• Question 13: A. nucleotide
• Question 14: A. It allows for a wide variety of proteins to be produced that will carry out a wide variety of functions.