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WorksheetsStructure and Function Quiz
Total questions: 20
Worksheet time: 20mins
Which of these is a segment of DNA that contains the information necessary to produce a protein?
A base
A gene
A codon
a chromosome
Small, uncharged substances enter and leave the cell membrane through the process of
endocytosis.
simple diffusion.
active transport.
facilitated diffusion.
Facilitated diffusion and ________________ are alike since neither requires energy.
endocytosis
phagocytosis
active transport
simple diffusion
_________ are responsible for the transport of substances down a concentration gradient during facilitated diffusion.
Ionic pumps
Ion channels
Carrier proteins
Protein receptors
The sequence of ________________ in a DNA molecule determines the protein that will be produced.
lipids
nucleotides
proteins
sugar
DNA and RNA differ in all BUT one of the following ways.
DNA is double-stranded, while RNA is single stranded.
RNA uses the sugar ribose in its backbone, while DNA uses deoxyribose.
DNA contains the base uracil, while RNA contains the base thymine instead.
DNA is found in chromosomes in the nucleus, while RNA can move around the cell.
Substances like oxygen pass through the cell without the use of energy and move from an area of high concentration to an area of low concentration. This process is called
osmosis.
filtration.
active transport.
passive transport.
The instructions for making proteins come originally from
RNA
ribosomes
DNA
amino acids
What is deoxyribose
an acid found in DNA
a sugar found in DNA
pigment found in RNA
a nitrogenous base found in DNA and RNA
Homeostasis is the regulation of an organism’s internal environment to maintain conditions suitable for life. Homeostasis requires
competition between the body’s systems.
balance between all of the body’s systems.
the body’s systems to act independently of each other.
maximum growth of all types of cells and tissues within the body.
A section of this DNA molecule that codes for a specific inherited trait is called a
chromosome
codon
gene
phenotype
The picture shows the active transport of ions by the sodium-potassium pump.
How is diffusion different from this process?
Diffusion takes place due to osmotic pressure.
Diffusion requires cellular energy for the transfer of molecules.
Diffusion requires protein channels as a passage-way for particles.
Diffusion transfers particles from an area of high to low concentration.
Proteins are different based on number and type of ____________ contained in their polypeptide chain(s).
fatty acids
amino acids
nucleic acids
monosaccharides
DNA, amino acids, and proteins are all molecules that play a vital role in your life, even though you have never seen them. In fact, these three types of molecules are tightly linked. What is the relationship between them?
DNA codes call for specific amino acids, which are assembled into proteins needed by your body.
Amino acids combine specific DNA strands into the proteins that are used throughout your body.
Proteins combine specific DNA strands into the amino acids that are used throughout your body.
DNA codes call for specific proteins, which are assembled into the amino acids needed by your body.
Proteins are important biomolecules that build organisms and direct chemical reactions. Proteins are polymers composed of long chains of
nucleotides
amino acids
phospholipids
monosaccharides
The process of _____________ is modeled in the plant cell diagrams seen here.
osmosis
tonicity
active transport
facilitated transport
In order to conserve body heat, the body will react to maintain homeostasis. Identify one way in which the body will react.
blood supply will be directed to superficial blood vessels
blood supply is pumped to extremities
the skin starts to sweat
shivering
DNA, in the nucleus carries the genetic code for making proteins in ribosomes. In the diagram, B, represents the proteins produced. DNA cannot leave the nucleus to carry the genetic information to the ribosome where proteins are produced. How does the genetic code get from the nucleus to the ribosome? What does A represent?
RNA
chromosomes
ribosome
translation
The R group or side chain of the amino acid threonine is highly polar. The R group or side chain of the amino acid leucine is highly nonpolar. In what location on the tertiary structure of a protein would you expect to find these amino acids?
Both threonine and leucine would be on the exterior of the protein.
Both threonine and leucine would be in the interior of the protein.
Threonine would be on the interior, and leucine would be on the exterior of the protein.
Leucine would be on the interior, and threonine would be on the exterior of the protein.
Intermolecular forces hold biomolecules together. They are also found between biomolecules. Which of these is a place you would expect to find a hydrogen bond in a biomolecule?
between amino acids in a protein
between adenine and thymine in DNA
between the ribose and phosphate in RNA
between glucose and fructose in a sucrose molecule
