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Unit Tests 1-4 Q&A
Terms in this set (37)
While you are riding the ski lift up to the top of the mountain on a very cold day you start to shiver involuntarily. You know that the shivering is your body's attempt to help regulate your body temperature and is an example of what type of mechanism?
Which of the following sequences of organization is likely to be seen in a multicellular organism, going from smallest to largest?
cell, tissue, organ system, organism
The method of reasoning that uses construction of general principles by careful examination of many specific cases is called __________ reasoning.
From the time of the Greek Eratosthenes to the present day, scientists have been using the method of _____ reasoning, in which general principles are applied to the analysis of specific cases.
A squirrel and a rabbit, both in the same community, must also be in the same _________.
Water is extremely important in living things for all of the following reasons except that it.....
is an excellent buffer
Which of the following is NOT true about Charles Darwin:
He published On the Origin of Species by Means of Natural Selection as soon as he returned to England from his voyage around South America.
Which of the following is NOT a characteristic of Cell Theory?
cells are spontaneously generated from inorganic substances
Egg whites consist primarily of water and the protein albumin. When you fry an egg, why does the egg white turn from clear to white?
the protein becomes denatured
Muscles contraction is accomplished by a mechanism known as the cross-bridge cycle, in which myosin heads bind to actin and cause the actin filaments to move across the myosin filaments. Which of the following is capable of providing the energy needed for this purpose?
A cytologist is examining a tissue under an electron microscope. He notices that the endoplasmic reticulum of each cell is extremely rough in appearance and of course knows that this is because of the ribosomes embedded there. He is curious about why there are so many ribosomes. You can help. What would be your response?
This tissue exports proteins to other areas of the body.
The endosymbiotic theory is supported by the finding of non-nuclear DNA in which of the following organelles?
Mitochondria and chloroplasts
Which of the following are short cellular projections that act to move materials over tissue surfaces in eukaryotes?
On the outer surface of the plasma membrane there are marker molecules that identify the cell-type. Often these molecules are
Many fields require heavy irrigation, and in desert areas much of that water evaporates, leaving behind solutes. This may cause plant cells to
shrivel, with the cell body shrinking from the cell wall, due to the osmosis of water to a lower water potential.
For the process of diffusion to occur, molecules must
move from areas of high concentration to areas of lesser concentration until an equilibrium is reached.
The Fluid Mosaic Model proposed by Singer and Nicolson in 1972 included that the cell member was composed of
a phospholipid bilayer with globular proteins actually inserted into the bilayer.
Use the diagram to answer the following questions.
Which structure represents the hydrophilic portion of a phospholipid?
You return home to find that your baby brother has scattered his toy trains and trucks all over the floor of your room. As you begin to pick up the toys and put them away, you realize that even though he is just a baby, he has clearly mastered
the second law of thermodynamics.
All of the biochemical pathways used in a cell constitute
An egg white is protein. Which of the following will denature the egg white?
Cooking the egg
Metabolic reactions fall under two general categories: anabolic and catabolic. What type of chemical reactions are these two classes of metabolic reactions?
Anabolic reactions are endergonic reactions, whereas catabolic reactions are exergonic.
Energy is defined as
the capacity to do work.
Why do we have storage macromolecules, such as fats, in our bodies?
We can break down these macromolecules to provide energy for the endergonic reactions in our bodies.
A calorie is the commonly used unit of chemical energy. It is also the unit of
capable of synthesizing their own food from sunlight or inorganic chemicals.
Which process produces alcohol or lactate?
Which of the following represents the correct sequence of stages in the cell cycle?
G1, S, G2, M
Chromosomes have centromeres, and when chromosomes are replicated they are called sister chromatids. Which statement is accurate?
In humans somatic cells there are 46 chromosomes and thus 46 centromeres. When replicated there are 92 sister chromatids and 46 centromeres.
The chromosomes of a multicellular organism are
composed of DNA and protein.
Which sequence of stages in mitosis is correct?
Prophase, prometaphase, metaphase, anaphase, telophase
The cell formed through fertilization is called a(n)
Which of the following terms is appropriate for meiosis but not mitosis?
Mitosis and meiosis are similar in that
sister chromatids move toward the poles in both.
Why is it necessary that meiosis ultimately produce haploid cells?
Haploid cells can combine to create diploid offspring.
Meiosis and mitosis are both processes that involve nuclear division. What is the difference between the two?
Mitosis is nuclear division, which ultimately leads to diploid somatic cells. Meiosis is nuclear division, which ultimately leads to haploid gametes.
Genetic recombination occurs due to
crossing over between homologous chromosomes.
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