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Published byBeatrice Ross Modified over 9 years ago
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Substance formed by the chemical joining of 2 or more elements in definite amounts
compound
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Type of ion that forms when an atom loses electrons
positive
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In a water molecule, why is the oxygen atom slightly negative
Electrons spend more time with it
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A mixture in which the substances are evenly spread out
solution
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Salt dissolves in water, what is the water called
solvent
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Any substance with a pH lower than 7 is
An acid
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Any substance with a pH higher than 7 is
A base
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What element can bond to one another and form a lot of different structures
carbon
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What is the monomer of protein
Amino acid
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What is the monomer of starch (carbohydrate)
Simple sugar (glucose)
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Is a protein a monomer or a polymer
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Enzymes affect the reactions in living cells by changing the _______ of the reaction
speed
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What type of cell encloses DNA in a nucleus eukaryotic
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Is a bacteria eukaryotic or prokaryotic
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An organelle called the nucleus is surrounded by what
cytoplasm
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Microtubles and microfilaments are structures involved in the cells _________
movement
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This converts chemical energy stored in food into compounds that are more convenient for the cell to use mitochondria
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Would you find the chloroplast in animal or plant cells plant
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What regulates the movement of materials into and out of the cell
Cell membrane (plasma membrane)
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What occurs because molecules are constantly moving and colliding with each other
diffusion
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What means of particle transport requires input of energy from the cell
Active transport
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Relatively constant internal physical conditions of an organism
homeostasis
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Adenine, ribose, and 3 phosphate groups make up what molecule
ATP
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What happens when 1 phosphate group is removed from ATP
Energy released
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Organisms that make their own food
autotrophs
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Plants gather energy with light-absorbing molecules called
pigments
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What do plants absorb in order to get energy needed for photosynthesis
sunlight
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What happens when chlorophyll is struck by sunlight
Electrons get energized
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What is the role of NADP+
Electron carrier
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Photosynthesis uses sunlight to convert water and carbon dioxide into
Oxygen and high-energy sugars (glucose)
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What do organisms get by breaking down food molecules
Energy (ATP)
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Electron transport, glycolysis, and the krebs cycle are part of ____________ _____________
Cellular respiration
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What is the correct order of cellular respiration (3 parts)
Glycolysis, krebs cycle, electron transport
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Cellular respiration releases energy by breaking down ______ molecules
food
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What are the reactants for cellular respiration
Glucose and oxygen
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________ increases faster than a cells surface area when it becomes larger
volume
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When a cell divides (mitosis) each daughter cell receives what from the parent cell
Exact copy of DNA
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What type of reproduction increases genetic diversity
Sexual reproduction
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Which is smaller; double helix or chromosome
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What is the middle (where the sister chromatids come together) of a chromosome called
centromere
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What form is DNA in during prophase, metaphase, and anaphase
chromosomes
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What does coming in contact with other cells/objects do to cell growth
Stop it
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Cancer is a disorder in which some cells have lost the ability to control their _______ ________
Growth rate
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Cancer cells form masses of cells called ___________
tumors
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What type of cells has the potential to develop into other cell types
Stem cells
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Cells are specialized through a process called _____________
differentiation
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What are the different forms of a gene called
alleles
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Both contributed a recessive allele
If a pea plant’s alleles for height are tt, what is true of its parents Both contributed a recessive allele
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Two identical alleles for a particular trait are said to be ?
homozygous
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Independent assortment
Principle that states that during gamete formation genes for different traits separate without influencing each other’s inheritance Independent assortment
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One allele for a gene is not completely dominant over another allele for that gene
Incomplete dominance
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Pattern of inheritance where there are 4 different versions of the gene for coat color
Multiple alleles
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This produces 2 diploid daughter cells
mitosis
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This produces 2 haploid daughter cells and then continues to meiosis II (results in 4 haploid cells)
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Variation in human skin color is an example of what?
Polygenic traits
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What process produces gametes
meiosis
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A homologous pair of chromosomes, each make of two chromatids
tetrad
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What is a good molecule for storing info because its bases can be put in any order (like the alphabet) DNA
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What happens to DNA before cell division
Replication (copied)
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What do bacteriophages infect
bacteria
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In eukaryotes, where is the DNA located
In nucleus
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DNA replication results in 2 DNA molecules. 1 ____ and 1 ______
New … original
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In which cells is the accurate transmission of information most important
Sex cells
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Deoxyribose + phosphate group + cytosine = ?
Nucleotide of DNA (cytosine)
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According to base pairing what is equal to what? A=? G=?
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Unlike DNA, RNA contains
uracil
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What type of RNA brings the information in the genetic code from the nucleus to other parts of the cell mRNA
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During transcription, RNA is a complimentary strand to one part of one strand of ___
DNA
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What process uses a messenger RNA code to make proteins
translation
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Genes contain instructions for assembling _____
proteins
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A cell reads the instructions in DNA and builds a protein based on those instructions
Gene expression
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Where does transcription take place
In the nucleus
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Where does translation take place
In the cytoplasm
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How do most mutations effect an organism
No effect
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Human females produce egg cells that have one ____ chromosome
X
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How many chromosomes are shown in a normal human karyotype
46
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What type of genes are located on the X and Y chromosomes
Sex linked
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The failure of chromosomes to separate during meiosis
nondisjuncture
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No baby has ever been born without which chromosome
X
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Some gametes may have an extra copy of some genes if ___________ occurs during meiosis
nondisjuncture
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What project is an attempt to sequence the DNA of every human gene
Human genome
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Who figured out and explain how living things change over time and supported his ideas with evidence
Darwin
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Who suggested the earth was old enough for evolution to have occurred
Hutton and Lyell
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Who said… traits/body structures arise as the actions of organisms by what they use or fail to use them Lamark
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Whos idea suggests events like war, starvation, and disease could prevent the endless growth of human populations Malthus
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What type of selection is when a farmer breeds only his or her best livestock
artificial
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The ability of an organism to survive and reproduce in its specific environment
fitness
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What happens to organisms that have variations best suited to environmental conditions
Survive and reproduce
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Homologous structures
Similar pattern of embryological development in different but related organisms Homologous structures
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Sexual reproduction, lateral gene transfer, and mutations are all sources of
Genetic variation
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A single gene trait that has two alleles (D vs r) has _____ phenotypes
2
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Situation in which allele frequencies in a gene pool of a population remain constant
Genetic equilibrium
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In genetic drift, the allele frequencies in a gene pool change because of ______
chance
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