Biology Test 1 Flashcards
All of the following are characteristics of life EXCEPT?
a. Evolution
b. Reproduction
c. Homeostasis
d. Multicellularity
Multicellularity
Which property of life can a scientist directly observe in a single plant fossil?
a. Homeostasis
b. Organization
c. Energy use
d. Growth
Organization
Because plants use sunlight as an energy source, they are considered to be?
a. Autotrophs
b. Consumers
c. Heterotrophs
d. Decomposers
Autotrophs
Can a scientific theory be proved wrong?
a. No, theories are the same as facts
b. No, because there is no good way to test a theory
c. Yes, a new observation or interpretation of data could disprove a theory
d. Yes, theories are the same as hypotheses
Yes, a new observation or interruption of data could disprove a theory
In an experiment to test the effect of temperature on the rate of bacterial reproduction, temperature would be the?
a. Standardized variable
b. Independent variable
c. Dependent variable
d. Control variable
Independent Variable
Which of the following is a type of chemical bond?
a. Covalent
b. Ionic
c. Hydrogen
d. All of the above are chemical bonds
All of the above are chemical bonds
A hydrophilic substance is one that can?
a. Form covalent bonds with hydrogen
b. Dissolve in water
c. Buffer a solution
d. Mix with nonpolar solvents
Dissolve in water
Which of the following is NOT a property of water?
a. Water is cohesive
b. Water is an excellent solvent
c. Water shrinks when it freezes
d. Water regulates temperature change
Water shrinks when it freezes
An acidic solution would have a pH of?
a. Below 7
b. Above 7
c. 7
d. 42
Below 7
What type of bond forms during a dehydration synthesis reaction?
a. Covalent
b. Ionic
c. Hydrogen
d. Polymer
Covalent
A sugar is an example of a ______, whereas DNA is a ______?
a. Protein; nucleic acid
b. Nucleic acid; lipid
c. Lipid; protein
d. Carbohydrate; nucleic acid
Carbohydrate; nucleic acid
A protein is composed of ______monomers, while nucleic acids are made of______?
a. Monosaccharides; nucleotides
b. Amino acids; fatty acids
c. Amino acids; nucleotides
d. Peptides; glycerol
Amino acids; nucleotides
Which macromolecule is hydrophobic?
a. Lipids
b. Proteins
c. Carbohydrates
d. Nucleic acids
Lipids
The shape of a protein is determined by?
a. The sequence of amino acids
b. Chemical bonds between amino acids
c. Temperature and pH
d. All of the above are correct
All of the above are correct
Which nucleotide does not occur in RNA?
a. Guanine
b. Thymine
c. Adenine
d. Cytosine
Thymine
What is the smallest unit of life?
a. Chicken
b. DNA
c. Protein
d. Cell
Cell
Which of the following is NOT a feature found in all cells?
a. Proteins
b. Ribosomes
c. Cell wall
d. Cell membrane
Cell wall
One property that distinguishes cells in Domain Eukarya from Domain Bacteria is the presence of?
a. A cell wall
b. DNA
c. Flagella
d. Membrane-bound organelles
Membrane-bound organelles
What kind of microscope allows for the observation of living organisms?
a. Light microscope
b. Scanning electron microscope
c. Transmission electron microscope
d. Oscilloscope
Light Microscope
Which of the following are key structures unique to plant cells?
a. Chloroplast
b. Vacuole
c. Cell wall
d. All of the above
All of the above
The largest unit of the cytoskeleton is?
a. Intermediate filaments
b. Cell wall
c. Microtubules
d. Microfilaments
Microtubules
Which of the following organelles are associated with the job of cellular digestion?
a. Lysosomes and peroxisomes
b. Golgi apparatus and vesicles
c. Nucleus and nucleolus
d. Smooth and rough endoplasmic reticulum
Lysosomes and Peroxisomes
Within a single cell, which of following is physically the smallest?
a. Nuclear envelope
b. Phospholipid molecule
c. Cell membrane
d. Mitochondrion
Phospholipid Molecule
Which of the following organelles does NOT contain its own DNA?
a. Nucleus
b. Chloroplast
c. Rough endoplasmic reticulum
d. Mitochondrion
Rough endoplasmic reticulum
