PBIO Exam 1
why are plants important? - ✔✔-plants produce most of the oxygen we breathe
-plants produce most of the chemically stored energy we consumer as food and burn for fuel
-plants are an excellent model organis
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PBIO Exam 1
why are plants important? - ✔✔-plants produce most of the oxygen we breathe
-plants produce most of the chemically stored energy we consumer as food and burn for fuel
-plants are an excellent model organisms for basic science
which of the following statements is NOT correct? - ✔✔-plants have chitin-rich cell walls
viruses were first discovered - ✔✔in mosaic disease of tobacco leaves
not all plants are _________; non plants, such as algae, are ______________ -
✔✔photosynthetic
imagine that in hanging a sign you pound a nail into the bark of a 10-meter tall tree. if your nail
were initially 0.5 (2) meter above the ground level, at approximately what height would you
expect to find the nail when the tree reaches 20 meters in height? - ✔✔0.5 (2) meter above the
ground
which of the following is NOT correct? - ✔✔a molecule is a substance that consists of two or
more atoms of the same or different elements joined by chemical bonds. for example, a water
molecule (H2O) is made of two elements of hydrogen and one element of oxygen
hydrogen bonding - ✔✔makes molecules cohesive
living cells - ✔✔are composed mostly of water and organic compounds
starch and cellulose - ✔✔both consist of chains of glucose linked together by covalent bonds; it
is the nature of those bonds that distinguishes these two compounds
digitalin is extracted from the seeds of the purple foxglove (Digitalis pupurea). which of the
following statements is correct? - ✔✔-it is a steroid
-it deters herbivores from eating the plant leaves by making herbivores ill
-in the US alone, several million people rely on digitalin and related compounds from foxglove
for treatment of congestive heart failure
which of the following is NOT true of a starch? - ✔✔-it is synthesized from up to 1000 glucose
molecules by hydration reactions to form a complex branched chain
-alternating C6 molecules are on opposite sides of the polymer chain
what are the 4 basic types of organic compounds in living things? - ✔✔carbohydrates, proteins,
lipids, and nucleic acids
in plants, disaccharides are used for short-term energy storage. the most common plant
disaccharide is sucrose, or table sugar, which if obtained commercially from sugarcane and sugar
beets. the diagram below shoes a synthesis of sucrose from glucose and fructose. which of the
following statements is correct? - ✔✔fructose, has the same chemical formula (C6H12O6) as
glucose, but the different arrangement of its atoms gives it different properties, such as a slightly
sweeter taste
fats and oils are made from two building block
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