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biology exam #3
Terms in this set (79)
There are ____ chromosomes in a human body cell.
Which of the following is TRUE about human chromosomes?
Human gametes are haploid, and have 23 chromosomes each
all of these
The mitotic spindle is composed of
The chromatids detach from one another , and become visibly separate chromosomes during which stage of mitosis?
Division of eukaryotic cells into two genetically identical cells is called
The figure above represents:
an original chromsome with an attached exact duplicate
If a parent cell has 16 chromosomes, how many sister chromatids will be present after duplication of the chromosomes?
The interval before the onset of DNA replication is called
the G1 stage
The chromosomes are aligned at the spindle equator during which stage of mitosis?
Chromosomes and genes are replicated during
Chromosomes are replicated during what stage of the cell cycle?
The 2 daughter cells produced by mitosis, are...
genetically identical to each other, and to the parental cell
Cells with two of each kind of chromosome are described by the term
Mitosis and cytoplasmic division function in
all of these
When cells stop responding to normal controls over growth and division they
begin to form a tumor
When cells are not responding to normal controls over growth and cell division, they form a tissue mass known as a
Chromatids that are attached together at the centromere, are called what kind of chromatids?
Select the BEST answer. When a cell undergoes mitosis,
the daughter cells have identical genes, and the daughter cells have genes identical to those of the mother cell that produced it
In eukaryotic cells, which can occur during the stages of mitosis?
fragmentation of nuclear envelope
The mitotic spindle (spindle fibers) first begin to become visible during which stage of mitosis?
Four of the five events listed below are stages of actual mitotic nuclear division. Select the exception
The distribution of cytoplasm to daughter cells is accomplished during
A gene locus is
the specific location of a gene on a chromosome
An organism's traits are determined by is specific combinations of inherited
Which of the following is the correct order of events during mitosis?
The kinetochore becomes attached to the mitotic spindle. Sister chromatids line up at the metaphase plate. The kinetochore breaks apart and the sister chromatids seperate. The nucleus r
The number of DNA molecules in a duplicated chromosome is
The chromosomes reach the opposite poles during which stage of mitosis?
Which of the following is NOT true of mitotic spindles?
They are permanent (always present) cell structures
The cell plate is composed of
golgi vesicles fusing at the area of the old metaphase plate (middle of the original mother cell)
The name/description of a cell that undergoes uncontrolled cell division
The chromosomes move towards opposite poles during which stage of mitosis?
Which of the following is NOT an example of the results of mitosis?
the non-identical offspring produced by two parents
A gene that codes for a positive cell cycle regulator is called a
FtsZ proteins direct the formation of a ___ that will eventually form the new cell walls of the prokaryotic daughter
Separation of the sister chromatids is a characteristic of which stage of mitosis?
Which eukaryotic cell-cycle event is missing in binary fission?
A diploid cell has ___ number of chromosomes as a haploid cell
two time the
Changes to the nucleotides in a segment of DNA that codes for a specific protein
Four of the five choices listed below are events occurring during mitosis. Select the exception.
a) chromosome replication
b) division of centromere
c) lining up of chromosomes at the cellular equator
d) attachment of spindle microtubules to centromeres
e) migration of chromosomes to opposite ends of the cell
In mitosis, if a parent cell has 16 chromosomes, each daughter cell will have how many chromosomes?
When cells stop responding to normal controls cell division, they can cause
all of these
In which part of the leaf does most of the photosyntheiss occur?
All EXCEPT which of the follwoing must be available for the first Calvin Cycle reactions to occur?
Plants need which ONE of the following pairs of molecules to carry on photosynthesis?
carbon dioxide and water
Which of the following is the MOST correct overall formula for the process of photosynthesis in plants?
Which of the following colors of light carries the least energy?
The carbon dioxide acceptor molecule in the Calvin Cycle is
Which of the following occurs during the Calvin Cycle of photosynthesis?
Glucose is produced
In which part of the leaf does most of the photosynthesis occur?
The carbon source for organisms that derive their energy from photosynthesis is
Which of the following colors of light has the greatest energy?
Which of the following colors of light has the shortest wavelength?
Excess glucose in most complex parts is stored as which energy storage molecule?
The oxygen released suring photosynthesis directly comes from
Where in a plant cell is chlorophyll found?
in the thylakoids
Photosystems mainly contain
light-trapping pigment molecules
The two photosystems of light reactions are designated
photosystem I and photosystem II
Where are sugars formed in the chlooplasts?
in the stroma
Most carbon enters the web of life through
Electron transport chains concentrate energy that is then used to generate ATP in
all of these
The final hydrogen acceptor/carrier in the noncyclic pathway of ATP formation is?
Four of the five molecules listed below are involved in the Calvin Cycle. Select the exception
Which of the following is NOT involved/used /produced during the light-dependent reactions?
The light-trapping photosystems of photosynthesis are located in which part of the chloroplast?
in the thylakoid membrane
Which of the following statements is FALSE concerning photosynthetic plants?
they require only energy and a carbon source to make their food
WHich of the following molecules has three carbon atoms in it?
All of the products of the light0dependent reactions of photosynthesis listed below are used in the Calvin Cycle, EXCEPT for
The internal membrane system of the chloroplast is the
Which of the following statements is TRUE about NADPH?
it is produced in the light-dependent reactions of photosynthesis
Air enters and leaves through the
Which statement correctly describes carbon fixation?
the incorporation of CO2 to an organic molecule
Where in plant cells does the Calvin Cycle take place?
What is the molecule that leaves the Calvin cycle to be converted into glucose?
Which statement about thylakoids in eukaryotes is FALSE?
thylakoids exist as a maze of folded membranes
Which molecule absorbs the energy of a photon in photosynthesis?
From where does a heterotroph directly obtain its energy?
eating other organisms
Which color of light does chlorophyll a reflect?
What two products result from photosynthesis?
glucose and oxygen
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