Biology test 4
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Biology test 4
Photosynthesis and cell division
How do you form a carbohydrate?
In photosynthesis, what is the carbon source?
In photosynthesis, what is the electron source?
In photosynthesis, what is the energy source?
What is the function of pigments?
Absorb energy from light
What is the main accessory pigment?
Evaporation of H20 from leaf surfaces
What are examples of photosynthetic "sinks"
flowers and fruits
When a plant gets too dry and must close its stomata to conserve H2O, which limits photosynthesis, it creates a build up of 02.
What do CAM plants do to deal with dehydration?
They open their stomata at night, incorporating C02 into organic acids. Stomata close during the day, and C02 is released from organic acids and used in the Calvin Cycle; temporal separation
What is the "normal" type of photosynthesis?
Cells that are able to divide to become anything
Cells that are able to divide into specific cells
What are the aspects of gene expression?
Controlled cell death (apoptosis)
Functions of chromatin
Structural or packing proteins (histones)
Non-reproductive cells that have two sets of chromosomes
What are the two elements that make up the maturation promoting factor?
Cyclins and Kinases
External signal, proteins released by certain cells that stimulate cells to divide
Crowded cells stop dividing
Cells must be attached to a substratum in order to divide
When a normal cell is converted to a cancerous cell
What are the phases of Interphase?
: first gap; preparation for DNA synthesis
: synthesis; DNA replication
: second gap
What are the stages of mitosis
Chromosomal Theory of Inheritance
Phenotypical traits have a physical location and can be followed
How do prokaryotic cells divide their cells?
What are the pros/cons of asexual reproduction?
: fast; no genetic partner required
: no genetic variation
What are the pros/cons of sexual reproduction?
: genetic variation
: requires partner; slow; energetically demanding
What are the aspects of Meiosis?
Reduce genetic material by half (reduction division)
Homologous chromosomes are the same in regards to ____ but different in regards to ____
-Length, shape, centromere position same traits, same gene order, and same corresponding loci