Bio 1-5 Exam
When a person orders a cheeseburger with lettuce, tomato, and mayonnaise, which of the following would be a true statement about the nutritional intake?
Amino acids can be obtained from the hamburger patty.
Which one of the following is the smallest unit of matter that has all the properties of an element?
Atom
In what ways are radioactive isotopes potentially harmful?
Unmonitored release into the environment can make changes in a cell's DNA.
Heartburn occurs when stomach acid escapes the stomach and burns the tissues of the esophagus. Baking soda is sometimes used as an antacid. How does baking soda help relieve symptoms of heartburn?
The baking soda is serving as a buffer to take up excess H + ions from stomach acid.
Of the following examples, which best demonstrates the property of water cohesion?
Water can move up a 100-foot pine tree, from the roots to the leaves.
Which of the following levels of biological organization is correctly matched with an example?
a desert with little water, high heat, sand, cacti, and some mammals- ecosystem
As a molecule moves through the plasma membrane it passes through
a hydrophilic layer of phospholipid heads, then a hydrophobic layer of phospholipid tails, and then another hydrophilic layer of phospholipid heads.
An ionic bond forms when
a negatively charged ion is attracted to one with a positive charge.
A nucleotide is made of which of the following chemical components?
a nitrogen-containing base, a phosphate group, and a sugar
Eukaryotic cells have DNA enclosed in a double membrane called the nucleus. The nucleus functions to
separate the DNA from other activities that occur in the cytoplasm.
Which of the following correctly lists the classification categories from least to most inclusive?
species, genus, family, order, class, phylum, kingdom, domain
Plants store their sugar in the form of
starch.
The number of neutrons present in the nucleus of an average atom of any given element is best estimated by
subtracting the number of protons from the mass number.
Cell size is limited because ________ is critical to a cell's function.
surface-area-to-volume ratio
What function does the nucleolus have?
synthesizes ribosomal RNA
After drinking a great deal of coffee (pH 5), a human's blood buffering system would need to ________ as the coffee was digested to lower the level of acid present in the blood stream.
take up H +
Which of the following allows eukaryotic cells and their organelles to move?
the cytoskeleton
Which of the following is a function of glycoproteins?
to permit cells to recognize one another
Hydrolysis of sucrose, a disaccharide, results in
two monosaccharides.
A water molecule, as shown here, is polar because of
unequal sharing of electrons.
A fatty acid that has double bonds is called
unsaturated.
Which of the following would be considered a trace element in living things?
zinc
What functional group makes a carbohydrate hydrophilic?
-OH
Kevin is studying predator-prey interactions. One day he notices a spider eating a cricket caught in its web. Later that day, a bird eats the spider. How many consumers has Kevin observed directly in this scenario? ev: 07_17_2014_QC_51325
2
An element has an atomic number of 88. The number of protons and electrons in a neutral atom of the element are
88 protons and 88 electrons.
Male amphibians, including frogs and toads, have been plagued by feminization, deformity, behavioral abnormalities and sterility. Biologists from the University of Florida investigated whether reproductive problems among populations of cane toads ( Bufo marinus) are caused by poisons from chemicals associated with agriculture. The biologists collected local adult cane toads from more than 20 different locations. Toads were collected from areas close to agriculture, both large-scale and small-scale farms, as well as from suburbs that are non agricultural areas. Which of the following statements would be the best hypothesis for this study?
Agricultural chemicals can cause deformities and feminization amongst cane toads.
Which one of the following is a potential danger of anabolic steroids?
All of the above answers are problems associated with anabolic steroids.
Which of the following is true about ecosystems?
All of the above answers are true.
Which of the following is a property of water?
All of the above are properties of water.
Which of the following is a type of intracellular protein?
All of the above are types of intracellular proteins.
When a sodium atom transfers an electron to a chlorine atom
All of the above statements are correct.
Which of the following statements is correctly matched to the step of the scientific method?
All of the above statements are correctly matched.
Which of the following statements about basic solutions is true?
Basic solutions release OH -.
Which statement below is correct when comparing plant and animal cells?
Both plant and animal cells have a plasma membrane, and plant cells also have a cell wall.
Which of the following elements are found in glucose?
C, H, O
How does DNA differ from RNA?
DNA is comprised of a double-strand; RNA is a single-strand.
Deoxyribose is a sugar found in
DNA.
Plant cells have walls but do not have plasma membranes.
False
Positron-emission tomography (PET) is an example of how ions are useful in medicine.
False
Which of the following organelles would form a membrane-bound package, also known as a vesicle?
Golgi apparatus
Cola has a pH of 3.5. This means that it has an excess of _______ ions and would be called a(n) ________.
H +; acid
Which of the following classification categories for humans is correct?
Homo sapiens: binomial name
Which of the following statements describes the function of a chloroplast?
It converts light energy into chemical energy.
Which of the following would be an example of the value of water's heat capacity?
Living organisms are able to maintain their internal body temperatures because the water in their cells resists changes in temperature.
Which structures determine the flexibility of the extracellular matrix?
Proteins
Which kingdom includes both unicellular and multicellular organisms?
Protista
Which of the following statements about atoms is correct?
The number and arrangement of electrons in an atom governs its chemical activity
Which of the following is a true statement about proteins?
The three dimensional shape of a protein is a result of its secondary structure.
What do lemons, tomatoes, and coffee all have in common chemically?
They all produce H +ions in solution, making them acids.
Which of the following is a function of the nucleus?
acts as the control center of the cell
Which is the most common type of intercellular junction between cells of the bladder?
adhesion junctions
Which of the following is in correct order from smallest to largest?
amino acid - peptide - polypeptide
In which of the following is the correct monomer matched with its polymer?
amino acid - protein
Which of the following would describe a polypeptide?
amino acids joined by dehydration synthesis reactions
Some proteins within a cell can be viewed with
an electron microscope.
All atoms of the same element have the same
atomic number.
Receptor proteins allow a cell to
bind to signal proteins from other parts of the body.
A(n) ________ can be defined as asubstance that keeps pH within established limits by taking up excess H +or OH - in a solution.
buffer
A molecule is said to be organic if it contains
carbon and hydrogen atoms.
Without gap junctions in certain tissues
cells would not be able to communicate with each other
Which of the following correctly lists the levels of biological organization from simplest to most complex?
cells, tissues, organs, organ systems, organism
Which of the following properties of water involve hydrogen bonds? Check all that apply
cohesion high heat capacity surface tension water expands as it freezes
The pH scale is a mathematical indicator of the
concentration of H + present in a solution.
Chromosomes are made from
condensed chromatin.
Chloroplasts and mitochondria are similar in that they both
contain DNA.
A triglyceride is formed when three fatty acids join a glycerol by a
dehydration synthesis reaction.
An atom's valence electron shell
determines its chemical reactivity.
Surface-to-volume ratio is an important characteristic for cell function; some cells increase their ratio by
developing finger-like projections.
The nucleus has a double membrane that encloses the DNA. Inside the nucleus, the DNA acts as the template to produce mRNA and ribosomes.To exit the nucleus, these molecules must
diffuse through the double membrane into the cytoplasm.
A biologist is studying how acid rain affects earthworm and beetle populations in a portion of Yellowstone National Park. What level of organization is she studying?
ecosystem
A covalent bond occurs when
electrons are shared between two atoms to complete their octets.
Which one of the following is a main function of proteins?
enzymatic activity
The figure below represents the formation of a ________ molecule by the process of ________.
fat; dehydration synthesis
Select the incorrect association.
fructose - a polysaccharide
Which word should be categorized separately from the others?
glycogen
Which of the following is a hydrolysis reaction?
glycogen forming glucose molecules
Humans store glucose in the form of
glycogen.
Some insects can stride on the surface of water because water
has surface tension.
The term "functional" is used in the phrase "functional group" because it describes a group of atoms that
help determine the chemical properties of an organic molecule.
The figure below is depicting the interaction of water molecules with one another. The weak attractions between water molecules are known as
hydrogen bonds.
If a material mixes readily with water, it is identified as
hydrophilic.
An atom that has an electrical charge is called a(n)
ion.
The type of bond that would form from the transfer of an electron from one atom to another is a(n) ________ bond.
ionic
Which of the following is a correct match?
lysosomes - cellular digestion
Which of the following is a correct matching of an organelle and its function?
mitochondrion - cellular respiration
The basic building block or subunit of many biological molecules is called a(n)
monomer.
Isotopes of an element differ in their
neutron number.
Which of the following correctly lists the parts of a nucleotide of RNA?
nitrogen-containing base, ribose, phosphate
A saturated fat has
no double bonds.
Male amphibians, including frogs and toads, have been plagued by feminization, deformity, behavioral abnormalities and sterility. Biologists from the University of Florida investigated whether reproductive problems among populations of cane toads ( Bufo marinus) are caused by poisons from chemicals associated with agriculture. The biologists collected local adult cane toads from more than 20 different locations. Toads were collected from areas close to agriculture, both large-scale and small-scale farms, as well as from suburbs that are nonagricultural areas.Data collected by the biologists suggested a strong correlation between feminization of male toads and agricultural chemicals. Is it accurate to state that the scientists had supported their theory that agricultural chemicals cause deformities?
no, the scientists were testing a hypothesis which is not the same things as a theory
There is an antibiotic called streptomycin that inhibits the function of bacterial ribosomes. Consequently, as the bacterial cells die, the person taking the antibiotics gets better. In other words, the antibiotic destroys bacteria by
not allowing them to produce proteins.
Below is a diagram of a bacterium. What part of the bacterial cell does Y represent?
nucleoid
The polymer shown below is comprised of what kind of subunits?
nucleotides
Which of the following is a molecule?
o2
What must materials pass through to enter or leave a cell?
plasma membrane
Which feature is found in all cells?
plasma membrane composed of phospholipids
Plant cells are connected to one another by
plasmodesmata
Both plants and animals need mitochondria to
produce ATP.
Testosterone is a lipid-based hormone; insulin is a ________-based hormone.
protein
Which of the following is the correct sequence through the endomembrane system for material that is destined to be secreted from the cell?
rough endoplasmic reticulum - Golgi apparatus - plasma membrane
