Which of the following lists correctly presents levels of organization from simplest to most complex?
A scientist wishes to test a new antibiotic's ability to treat stubborn bacterial infections. He tests his hypothesis that the antibiotic works better than existing treatments by giving bacterial infections to mice and treating them with the antibiotic. He then determines how many of the mice recover from their infections. What is missing from his experimental design?
He is missing a control group that did not receive the new antibiotic.
A scientist wants to test the hypothesis that a certain bird species in her back yard changes its songs to warning calls whenever it detects the presence of a potential predator. What is most likely her initial observations?
Each time the scientist lets her cat outside, the birds abruptly changed their songs.
An “educated guess” as to what causes an observed phenomenon is known as a:
The attempt to refute a hypothesis is accomplished by which of the following tasks?
Which of the following elements is not particularly associated with living things?
What type of bond stabilizes 3-dimensional shapes of nucleic acids and proteins?
Hydrogen bonds
The “foundation” element of the macromolecules of life is?
Carbon
Water molecules have one oxygen atom that is more electronegative than the two hydrogen atoms bound to it. As a result, which type of bonding holds water molecules together?
Which of the following carbohydrates is used to store energy in animal cells?
Fatty acids are a component of what type of macromolecule?
Lipids
Water moves via osmosis_____.
From an area of low solute concentration to a high solute concentration.
What is the major component of the plant cell wall?
Cellulose
If you place a red blood cell into a beaker of salt water that is hypertonic, the blood cell will
Shrink
Which of the following are found in eukaryotic cells but not prokaryotic cells?
Where is most of the DNA found in the cell?
Nucleus
The interior of the membrane is known as being:
Hydrophobic
The cholesterol synthesized by cells uses which component of the glycolytic pathway as a starting point?
acetyl CoA
Chemiosmosis involves
the movement of hydrogen ions across a mitochondrial membrane.
What process converts grape juice into wine?
Fermentation
The energy currency used by cells is
ATP
Where in the eukaryotic cell does the Citric Acid Cycle occur?
Mitochondria
What color(s) of light does chlorophyll a reflect?
Green
Which statement about thylakoids in eukaryotes is not correct?
Where in the eukaryotic cell does photosynthesis take place?
Chloroplasts
The type of logical thinking that uses related observations to arrive at a general conclusion is called
Inductive reasoning
The smallest unit of biological structure that meets the functional requirements of “living” is the
Cell
What type of bond represents a weak chemical bond?
Hydrogen bond
The monomers that make up proteins are called
Amino acids
An isotope of sodium (Na) has a mass number of 22 and an atomic number of 11. How many neutrons does it have?
11
Which of the following statements is not true?
The glucose that enters the glycolysis pathway is split into two molecules of
Pyruvate
What do the electrons added to NAD + do?
They are passed to protein complexes in the ETC.
Which of the following is not true about enzymes?
Energy is stored long -term in the bonds of _____ and used short -term to perform work from a(n) ____ molecule.
Glucose:ATP
Which of the following fermentation methods can occur in animal skeletal muscles?
What is the energy of a photon first used to do in photosynthesis?
Energize an electron
What two products result from photosynthesis?
Glucose and oxygen
From where does a heterotroph directly obtain its energy?
Eating other organisms
What is the molecule that leaves the Calvin cycle to be converted into glucose?
G3P
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