BI 101 Unit 1 Quiz

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1. Carbohydrates are used for
2.An _element_____ is defined as a pure substance made up of one type of atoms and
cannot be further subdivided into simpler substances by any physical or chemical means.
3 Orchids were studied to determine if the amount of humidity affected the flowering of
these plants. Which of these was the independent variable in this study?
4 A solution with a pH below 7 is
5 For the following statement, what is the dependent variable?
6 Identify and briefly explain the four levels of protein structure.
7 A protein molecule which is denatured, has
8 Changing the number of neutrons of an atom changes its:
9 Which variable is measured rather than manipulated?
10 Some insects can "walk on water" because:
11 Richard was observing black swallowtail butterflies in the field. Which one of these is
an observation he made about a black swallowtail butterfly?

2. 12 The 'sequence', or order of amino acids in a protein is termed its ____________,
whereas the 3-dimensional structure of a two proteins interacting with each other is
termed its ____________.
13 Other that their pH, how would you differentiate between an acid and a base? Give and
example of each?
14 Of the following, which is the first explanation of a problem? It is sometimes called an
"educated testable guess."
15 ________ mechanisms are designed to accelerate or enhance the output created by a
stimulus that has already been activated.
16 Which element is present in all organic compounds?
17 The instructions for growth, development, metabolism, and reproduction of a cell are
contained in:
18 Homer notices that his shower is covered in a strange green slime. His friend Barney
tells him that coconut juice will get rid of the green slime. Homer sprays half of the
shower with coconut juice ad he sprays the other half with water. What is the control
set-up in this experiment?
19 A student wanted to look at plant growth in five different soil samples. He planted the
same type of seeds in identical containers and left them together in full sunlight. He gave
each plant the same amount of water and charted the growth of each plant stem. What is
the independent variable in this experiment?
20 You want to measure the effect of different amounts of oxygen on the rate of yeast
growth. What is the dependent variable?

3. 21, The most valid and reliable test of the hypothesis, more pine seeds germinate after a
forest fire, would include an experimental group of pine seeds that was recovered from a
fire area and pine seeds that were —
22. Which of the following might be referred to as "working macromolecules"?
23. Lipids are used for
24. The first step of the scientific method involves:
25. Identify two specific polysaccharides and describe where they are found and what
their biological role is.
26.
Enzymes will usually react with only one substance. This can be explained by the 'lock
and key' theory. If this theory is correct, which of the following substances, represented
by P, Q, R and S would be acted on by enzyme A?
Which particles have approximately the same size and mass as each other?
A solution with a pH below 7 is
What is a solution that has an excess of H + (hydrogen) ions?
The group of biologically important organic compounds responsible for storage and
transfer of information is
feedback acts to maintain a homeostasis feedback loop and reverses the direction of
change.