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Bio 10-13

STUDY
PLAY
What are the products of linear photophosphorylation?
ATP and NADPH
In autotrophic bacteria, where are the enzymes located that can carry on organic synthesis?
inner membrane surface of the plasma membrane
In mitochondria, chemiosmosis translocates protons from the matrix into the intermembrane space, whereas in chloroplasts, chemiosmosis translocates protons from
the stroma to the thylakoid space.
How is photosynthesis similar in C4 and CAM plants?
In both cases, rubisco is not used to fix carbon initially.
In mechanism, photophosphorylation is most similar to
oxidative phosphorylation in cellular respiration.
In C4 and CAM plants carbon dioxide is fixed in the _____ of mesophyll cells.
Cytoplasm
C4 plants differ from C3 and CAM plants in that C4 plants _____.
transfer fixed carbon dioxide to cells in which the Calvin cycle occurs
After chromosomes condense, the ______ is the region where the identical DNA molecules are most tightly attached to each other
Centromere
During Mitosis, microtubules attach to chromosomes at the _______
kinetochore
In dividing, what phase has the most growth
interphase
The ____________ is a cell structure consising of microtubules, which forms during early mitosis and plays a role in cell division
Mitotic Spindle
During interphase, most of the nucleus is filled with a complex of DNA and protein in a dispersed form called
chromatin
The ________ are the organzing centers for mcrotubules involed in seperatng chromasomes during mitosis
centrosomes
The formation of a cell plate is beginning across the middle of a cell and nuclei are re-forming at opposite ends of the cell. What kind of cell is this?
a plant cell undergoing cytokenesis
During prophase, the microtubules of the mitotic spindle
lengthen
During anaphase, the nonkinetochore microtubules __________ and move past each other, and the kinetochore mcrotubules __________
lengthen, shorten
During Telophase, the nonkinetochore microtubules
disassemble
An enzyme that attaches a phosphate group to another molecule is called a
Kinase
The decline of MPF activity at the end of mitosis is due to
the degradation of cyclin.
The drug cytochalasin B blocks the function of actin. Which of the following aspects of the cell cycle would be most disrupted by cytochalasin B?
cleavage furrow formation
Replication of DNA does not occur during
Mitosis
Nucleoli are present during _____.
Interphase
Centromeres divide and sister chromosomes become full-fledged chromosomes during _____.
anaphase
Spindle fibers attach to kinetochores during _____.
prometaphase
Cytokinesis in animal cells involves the formation of a
cleavage furrow
The events of prometaphase include the attachment of spindle fibers to
kinetochores
During prophase a homologous pair of chromosomes consists of _____.
two chromosomes and four chromatids
During _____ both the contents of the nucleus and the cytoplasm are divided.
mitotic phase
During _____ the cell grows and replicates both its organelles and its chromosomes.
Interphase
Through a microscope, you can see a cell plate beginning to develop across the middle of a cell and nuclei re-forming on either side of the cell plate. This cell is most likely
a plant cell during cytokenesis
Referring to a plant sexual life cycle, which of the following terms describes the process that leads directly to the formation of gametes?
Gametophyte mitosis
Homologous chromosomes synapse and crossing over occurs.
The statement is true for meiosis I only.
How do cells at the completion of meiosis compare with cells that have replicated their DNA and are just about to begin meiosis?
They have half the number of chromosomes and one-fourth the amount of DNA.