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Praxis II Biology Content (5235) |Questions Solved 100% Correct Answers| Already Passed
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Praxis II Biology Content (5235)|Questions Solved 100% Correct
Answers| Already Passed
Punctuated equilibrium refers to: - ANSWER The pattern of change in the fossil record of
some species and is typically defined as long periods of evolutionary stability followed by
short periods of rapid speciation
DNA polymerase can only synthesize a new strand of DNA by proceeding along the template
strand in this direction: - ANSWER 3' to 5'
Yes this is true
RNA polymerase does this in DNA replication - ANSWER Adds RNA primers to the parent strand
at the base of the replication fork, then DNA polymerase can build on these primers by adding
dNTPs
On a global level, 90% of all freshwater is used annually by: - ANSWER Agriculture
The first species to appear after a severe disturbance removes all existing vegetation from
an ecosystem: - ANSWER Pioneer species
Common pioneer species - ANSWER Lichens and mosses or hardy plants with extensive
root systems
A mature ovum produced from division of a primary oocyte has 18 chromosomes . How many
chromatids were present in the primary oocyte during prophase I of meiosis? - ANSWER 72
(Primary oocyte contained 36 (2n) )
,In nonvascular plants, such as mosses, the __________ is the dominant form of the plant -
ANSWER Gametophyte
In nonvascular plants the ___________ is dependent on the __________ for nutrients and
water - ANSWER Sporophyte; gametophyte
In 1665 this scientist studied cork using microscopy and noticed tiny empty chambers that he
designated: "cells" - ANSWER Robert Hooke
This was the first person to observe living cells by using microscopy to examine pond water;
called his findings "animalcules" (tiny animals) - ANSWER Aton van Leeuwenhoek
Studied mortality rates and connected them to contact with disease - ANSWER Ignaz Phillipp
Semmelweis
Viruses and bacteriophages were studied by these scientists - ANSWER Hershey and Chase
Louis Pasteur's work disproved: - ANSWER Spontaneous generation
Carolus Linnaeus' work was: - ANSWER Designating classification for organisms based on
similar characteristics
Taxonomic rank in order from the most broad / large group to the smallest and most specific:
- ANSWER Domain, Kingdom, Phylum, Class, Order, Family, Genus, Species
("Do Kinky people cry out for good sex?")
Phosphorus-32 and Sulfur-35 were used in an experiment that proved: - ANSWER Viruses infect
bacteria cells with their genetic material, and that genetic material is DNA and not protein.
,Accuracy describes how close:
Precision describes how close: - ANSWER The measurements you take are to the literature
value
The measurements you take are to each other
Greenhouse gases: - ANSWER Carbon dioxide, methane, nitrous oxide, fluorinated gases
Greenhouse effect occurs when: - ANSWER Greenhouse gases allow heat energy from the sun
to pass through the earths atmosphere as visible light, but prevent it from being reflected
back into space as infrared radiation
Four main classes of organic compounds: - ANSWER Carbohydrates, proteins, lipids, and nuclei
acids
This is the most common organic compound in living things: - ANSWER Carbohydrates
Three examples of carbohydrates: - ANSWER Sugars, starches, and cellulose
Two functions of carbohydrates: - ANSWER Glucose --> energy
Cellulose --> provides structure/ support in plant cells (cell wall)
7 different protein functions: - ANSWER -Connection (collagen)
-movement (actin myosin)
-Communication (markers)
-Regulation (hormones)
, -Immune defense (Ab)
-Enzymes
-Transport materials (channel proteins)
Four examples of lipids:
Lipid structure: - ANSWER Fats, oils, waxes, steroids
Glycerol attached to a fatty acid
Extinction is the death of all individuals within a _________ - ANSWER Species
A species is a group of: - ANSWER Organisms that can produce viable offspring
Saturated Fatty acids have:
Unsaturated fatty acids have: - ANSWER Carbons all single bonded to each other
(saturated with hydrogen a)
Carbons (some) are double bonded causing kinks and bends
In eukaryotic cells, RNA polymerase cannot bind to a gene initiate transcription until: - ANSWER
Transcription factors have first bound to the gene's regulatory sequences; after this RNA
polymerase associates with transcription factors
Transpiration in plants occurs through this structure: - ANSWER Stomata
Two equations for Hardy Weinberg: - ANSWER p + q = 1
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