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WorksheetsWGU C190 Biology
Total questions: 34
Worksheet time: 34mins
A gardener maintains a species of rose that produce either yellow flowers (the dominant phenotype) or white flowers (the recessive phenotype). One day, the gardener observes that a cross between two yellow rose bushes has led to a single rose bush with orange flowers.
What evolutionary mechanism is involved in the change in the gene pool of this species?
Mutation
Gene flow
Genetic drift
Artificial selection
Which item is an atom?
Carbon dioxide
Nitrogen
Sucrose
Methane
Which item would be classified as biotic?
Light
Wind
Temperature
Fungus
Male peacocks compete with one another to mate female peacocks. Males with more colorful tail feathers attract female mates at a higher rate than those without. Therefore, male peacocks have colorful tail feathers, whereas female peacocks do not.
What is this an example of?
Sexual selection
Artificial selection
Gene flow
Genetic drift
Largemouth bass have recently been introduced into ponds that previously did not contain any large, predatory fish.
Which adaptation would help the existing population of small, prey species of fish avoid predation from the largemouth bass?
Fins with smaller surface areas
Faster average swim speed
More noticeable body coloration
More time actively foraging for food each day
Which of these is an output of the light-dependent reaction of photosynthesis?
ATP
NADH
Glucose
Water
Which molecule is an input to the Calvin-Benson cycle?
Carbon dioxide
Oxygen
Sugar
Water
Which stage of cellular respiration releases carbon dioxide as a product?
Glycolysis
Krebs cycle
Electron transport chain
Calvin cycle
Which stage of cellular respiration releases the most energy and, therefore, produces the most ATP molecules?
Citric acid cycle
Glycolysis
Krebs cycle
Electron transport cycle
In the human body, muscle fibers metabolize sugars to produce energy. Fast-twitch muscle fibers, like those used during short-term, vigorous exercise, carry out an anaerobic process that produces less energy per sugar molecule processed.
Which metabolic process do fast-twitch muscle fibers carry out?
Fermentation
Respiration
Photosynthesis
Oxidation
Fermentation uses sugar in the absence of which molecule?
ADP
CO2
O2
H2O
A subatomic particle has a negative charge and is found in a shell of the atom.
What is this particle?
A neutron
A proton
An electron
a nucleus
What is the charge of a proton?
+1
0
-1
-2
A molecular bond results from an electron being transferred from one atom to another.
Which type of bond holds these atoms together?
Electroneutral
Ionic
Covalent
Hydrogen
Which situation describes covalent bonding?
One atom transfers an electron to another atom
An atom shares an electron with another atom
An atom transfers an electron to another atom and becomes electronegative
One electronegative atom bonds with an electropositive atom
Which substance is found in ATP?
Nitrogenous base
Lipids
Amino acids
Free fatty acids
The initial biochemical transformation of glucose during cellular respiration occurs within the cytoplasm of the cell. Glucose is transformed into glucose-6-phosphate as ATP is converted into ADP and a free phosphate group.
What is happening to energy in this initial step of glygolysis?
Energy is being created in the form of glucose-6-phosphate
Energy is being destroyed as ATP is converted to ADP
Energy is being transformed from chemical potential energy to kinetic energy
Energy is being released from ATP to power the conversion of glucose
A biological polymer consists of 358 amino acids linked together covalently.
What is this polymer?
A carbohydrate
A protein
A lipid
A nucleic acid
A molecule consists of a chain of glucose monomers linked together.
What is the function of this molecule within the cell?
To store genetic information
To catalyze chemical reactions
To transport materials
To store energy
After a rainy day, a leaf has small droplets of water on its surface.
Which property of water is this an example of?
Cohesion
Density
Good solvent
Temperature stability
A plastic water bottle is filled with water and placed in the freezer. The next day the frozen water has expanded, causing the plastic bottle to rupture.
Which characteristic of water is this an example of?
Cohesion
Density
Good solvent
Temperature stability
A cell undergoing meiosis is currently dividing. The two new daughter cells will be haploid, but the DNA they contain is still replicated. The homologous chromosomes have separated and are ready to start the second division, but they have not yet begun the second round of division.
Which stage of the cell cycle is this cell in?
Metaphase I
Telophase I
Metaphase II
Telophase II
Homologous pairs of chromosomes have separated into two cells. Sister chromatids in each cell have not yet lined up in the middle of the cell.
Which stage of the cell cycle is this?
Metaphase I
Prophase I
Metaphase II
Prophase II
Which type of cell division results in sex cells?
Mitosis
Meiosis
Interphase
Prophase
What characteristic describes both meiosis and mitosis?
Sister chromatids separate
There are two rounds of division
Genetically identical offspring are produced
Results in diploid cells
How is DNA structured during the metaphase stage of mitosis?
The chromatid at the center keeps the DNA apart at separate ends of the dividing cell
The chromatids consisting of DNA are moving apart
The centromere at the center keeps DNA lined up at the cell's equator
The centromeres keep the DNA in separate nuclei
What is true regarding the transition from metaphase to anaphase during mitosis?
DNA is condensed and then organized into chromosomes
Chromatids are separated and isolated into separate daughter nuclei
Sister chromatids are aligned along the center of the cell and then pulled apart into separate chromatids
Chromosomes are condensed and set along the midline of the cell
The diagram depicts a cell undergoing mitosis:
Which stage of mitosis is depicted?
Metaphase
Prophase
Telophase
Anaphase
Sister chromatids are being separated and moving towards opposite poles of the cell.
Which stage of mitosis is this?
Telophase
Anaphase
Prophase
Metaphase
Chromosomes are structures that contain hereditary material that will be passed from one generation to the next.
According to this information, which organic molecule must be present in chromosomes?
Glucose
RNA
DNA
Lipid
A cell has divided its chromosomes into two new nuclei. The cytoskeleton of the cell is currently pinching the cell in the middle to form two new cells.
In which stage of the cell cycle is this cell?
G1
Synthesis
G2
Cytokinesis
What is the function of the histones during S phase?
Organizing and helping to unwind the DNA so the replication enzymes can access it
Connecting two sister chromatids together to aid in sorting
Copying the DNA
Pushing the sister chromatids apart
What is the function of the flagellum?
Locomotion and sensing
Energy production
Photosynthesis
Genetic information storage
What is true of a eukaryotic cell?
It contains a mitochondrion
It lacks membrane-bound organelles
It falls under the bacteria domain
Its DNA is a circular, double-stranded chromosome
