bio final TEST 2
Terms in this set (40)
In this figure, mitosis is represented by which numbered part of the cycle?
Meiosis produces daughter cells with:
C) half the number of chromosomes as the parent cell.
You are conducting experiments with the ciliated protist Paramecium. These graphs show the results that you obtained when the Paramecium were placed in pond water, in Solution A, or in Solution B, with the number of times that the contractile vacuole pumped out water recorded over a period of time. Based upon these results, you conclude that:
A) The Paramecium in Solution A are taking up more water than those that are in either Solution B or in pond water.
Two energy organelles within eukaryotic cells originated as prokaryotic endosymbionts. Which of these statements does NOT provide evidence for the origin of these organelles as endosymbionts?
B) These organelles both perform oxygen generating photosynthesis.
The nucleus is:
B) the targeted organelle for enzymes that catalyze DNA replication.
Which of these relationships are a mutualism between a fungus an another organism?
B) Dutch Elm Disease.
C) Athlete's foot.
ANSWER: A, D
You have discovered a new species of algae but are having trouble determining which group of algae it belongs to. For each of the algae listed, choose the one character that, if present, would allow you to definitively determine into which group of algae this new species should be placed.
Body with a holdfast, blade and stipe
ANSWER: Green Algae (Chlorophyte):Chlorophyll B, Brown Algae (Phaeophyte):Body with a holdfast, blade and stipe, Golden Algae (Chrysophyte):Mixotroph, Red Algae (Rhodophyte):Phycobilins
Which of these groups of protists have members that are both free living autotrophs and parasitic heterotrophs?
E) Chlorophytes (green algae).
ANSWER: A, B, D
Which of these statements is NOT true of fungal hyphae?
B) They are predominately diploid.
In the fungal life cycle, if the number of chromosomes in a diploid nucleus is 10, which one of the following statements will be true?
D) The spores will be haploid and have five chromosomes per cell.
The major groups of fungi can be most readily distinguished by the:
B) reproductive structures that they produce.
Taxol is a chemotherapeutic drug that was first isolated from a plant, the Pacific Yew Tree. It prevents microtubules from breaking down into the subunit proteins, tubulin dimers, that form them. This drug particularly affects rapidly dividing cells, such as those found in tumors. This is because it would prevent:
C) microtubules from shortening during anaphase.
You are examining a single-celled organism that was recently discovered in a sample of water collected from a lake. The cell has a nucleus, it is diploid, and it has a cell wall made of cellulose. It feeds by absorption. Based upon this information, this organism is most likely:
C) an oomycete.
Over time, organelles within a cell wear out, compromising their function. These organelles are _______________________ so that the components can be reused by the cell.
B) recycled by lysosomes
Ciliates (such as Paramecium) are single-celled organisms that are covered with cilia. They use these cilia to propel themselves through the water in which they live. The components of the cytoskeleton that allows theses cilia to move are:
A) microtubules made of tubulin.
You are studying a eukaryotic cell and have found that a protein that should be synthesized in the rough ER is being synthesized on free ribosomes in the cytoplasm. This would most likely be due to a:
A) mutation in the SRP that binds to that protein.
Why are the filamentous body forms of cellular and plasmodial slime molds (myxomycetes and acrasiomycetes), water molds (oomycetes) and the hyphae of fungi considered a case of convergent evolution?
C) Filamentous shape is an adaptation for a nutritional mode as a decomposer.
The liver is the main detoxification organ in the human body. Based upon this function, one would expect to find high levels of ___________________ in the cells of the liver.
D) smooth endoplasmic reticulum
Why has the term Kingdom Protista been abandoned (choose all the apply)?
A) Because some protists are multicellular.
B) Because the Kingdom Protista is a paraphyletic group.
C) Because some protists are as small as prokaryotes.
D) Because protists have very diverse ecologies, ranging from obligate parasites to photoautotrophs.
E) Because some protists are more closely related to members of the plant, animal and fungal kingdoms than they are to other protists.
ANSWER: B, E
In Mastering Biology, you watched a video about biofuels research. The research group investigating the use of algae for biofuels is trying to find algae that:
A) produce the most lipids.
A chimpanzee bone marrow cell, in prophase of mitosis, contains 48 chromosomes. How many chromatids does it contain?
What do kinetoplastids and apicomplexans have in common?
D) They both have complex life cycles that include an insect and a human host.
Which of these places the meiotic events that can produce genetic variation among gametes in the correct order (earliest to latest during the process of meiosis)?
A) DNA replication - homologous chromosomes pair - crossing over - independent assortment
All of the organisms that are classified as protists:
D) have nuclei.
This figure shows three stages of cell division in a 2N=4 cell. Match the image with the appropriate stage.
B. Meiosis I
C. Meiosis II
ANSWER: B:Mitosis, C:Meiosis I, A:Meiosis II
Sordaria is a(n) _____________________ fungus that produces spores in a specialized sac structure that retains the order of the spores produced through meiosis, followed by mitosis.
Which one of these statements is true of fungal reproduction?
C) Fungi can undergo both asexual and sexual reproduction.
You have discovered a new species of fungus associated with plant roots. It invades the cells in the roots, forming arbuscular mycorhizzae. Based just upon this character, you confidently determine that this fungus is member of the:
Which of the following are two groups that are adapted to anaerobic conditions and contain modified mitochondria that lack DNA?
D) Diplomonads and Parabasalids.
Strombodinopsis, a naked ciliate protist, is able to eat the dinoflagellate Gymnodinium aureolum that is responsible for red-tides in coastal waters of the eastern United States. These red tides can result in massive fish
kills that negatively impact the fishing industry. A research team is proposing to introduce Strombodinopsis into the areas where this dinoflagellate lives. You would expect that when populations of Strombodinopsis are high, that
populations of Gymnodinium would be ____________, making for an effective biocontrol. Both of these organisms are members of the ______________.
A) low / alveloata
In a person who has at least one normal copy of the gene that codes for the protein Hexosaminidase-A (the enzyme that breaks down gangliosides), place these structures in the order of the pathway that is involved in the synthesis of this hydrolase enzyme (first to last).
A) Golgi Apparatus
C) Rough ER
D) Signal recognition particle
ANSWER: A:3, B:4, C:2, D:1
Which one of these statements is true of both mitosis and meiosis at some point during each process?
D) The centromere splits and sister chromatids are separated.
Fungi obtain nutrients by:
D) secreting digestive enzymes into the environment and transporting nutrients into their cells.
Which one of these groups of protists does NOT contain species that are human parasites?
C) Diatoms (bacillariophytes).
The movement of white blood cells through your body, engulfing of foreign particles, and the movement of chromosomes during mitosis are:
B) each performed by different components of the cytoskeleton.
During the human life cycle, the process of _______________ is responsible for producing sperm and eggs; the only ______________ cells are the gametes.
C) meiosis / haploid
For a diploid organism, a major difference between Meiosis I and Meiosis II is that ________________ Meiosis II.
B) DNA does not replicate before
During reproduction in Sordaria, the diploid nucleus that goes through meiosis to produce the ascospores is formed by:
How many chromosomes are found in the spores?
In Sordaria, how many different chromosomes arrangements can be produced through independent assortment?
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