leoddsquad1
Goes from an area with lower concentration to a higher concentration and requires energy
2 ways active transport is different from diffusion
It's contains conclusions not explained by the evidence given
A science researcher is reviewing another scientist experiment and conclusion the reviewer would most likely consider the experiment invalid if
A
A student was comparing preserved specimens of three plant species,x,y, and z. Which statement is not an example of an observation the student could have made and not an inference. A. The leaves produced by plant x are 4 cm across and 8 cm in length B. Plant y has large purple flowers that open at night c. Plant x produces many seeds that are highly attractive to finches D.The flowers of plant z are poisonous to household pets
Catalyst
A substance that accelerates the rate of chemical reaction is called a
Compound
A substanced formed by the combonation of two or more elemnets indefinite proportions?
pH of water that is put on the plants
Acid rain can have a ph between 1.5 and 5.0. Teh effect lof acid rain depends on the acidity of the rain and the characteristics of the environment . It appears that acid rain has a negative effect on plants. Provide the information below that should be included in a research plan to test the effect of pH on the earlhy growth o fbean plants in the laboratory. What is the independent variable?
a lock and key
Because the fit is so precise and active site and a substrate are often compared to
0 and 7
Between which numbers on the pH scale are acids?
hydrogen bonds
Changes in temperature and pH can decrease an enzyme's activity by breaking
nucleic acids
Dna and Rna are two types of
No
Does passive transport require energy from the cell?
lipids
Fats, oils, and cholesterol are all types of
CO2 and H2O
Identify the reactants in the chemical reaction CO2+H2O-->
C6H12O6 and 6O2
Identifyy the products in the following chemical reaction: 6H2O+6CO2 ----> C6H12O6+6O2
release energy
If a reaction in one direction absorbs energy, the reaction in the opposite direction will
It's canBe tested
In science a hypothesis is only useful if
biological catalysts present
In the body of a human, the types of chemical activites occuring within cells are most depindant on the
data
Information gathered from observing a plant grow 3 cm over a two week period results in
simple sugars
Most of the starch stored in the cells of a potato is composed of molecules that originally entered these cells as
qualitative
Observation that involves all 5 senses
quantitative
Observation that involves numbers
Poles to the equator
On Earth biodiversity generally increases from the
Metabolism
Organisms use energy for All chemical processes. Together all of these processes are called
Proteins, DNA, fats, starch
Polymers that have been assembled from smaller organic compounds
Amino acid is to protein
Simple sugar is to starch as
3
Single celled organism A- Amoeba Multicellular organism B- Humming Bird Which statement below is correct (choose one) 1. organism a lacks structures that maintain a dynamic equillibrium, while organism b has these structures 2. Organism A contains tissues while organism B lacks tissues 3. Organism A and organism B have structures that allow them to maintain homeostasis
monomer
Subunits that assemvle togerher to make larger units known as polymers
sequence of amino acids
The diagram below provides some information concerning proteins. A---influences_ _ -> Protein shape---Determines->protein function What phrase describes what is represented by A?
enzymes and synthesis
The diagram represents a series of reactions that can occur in an organism This diagram best illastrates the relation ship between
2
The equation below reptesents a chemical reaxtion kthat occurs in humans. substance X + Substance Y ---enzyme C--->substance W What dadta should be collected to support the hypothesis that enzyme C works best in an environment that is slightly basic? (Choose the best answer) 1. the amino acid sequence of enzyme C 2. The amount of substance W produced in five minutes at various pH levels 3.The shapes of substances X and Y after the reaction occurs 4. the tempature before the reaction occurs
facilitated diffusion
The movement of molecules down a concentration gradient through transport proteins (protein channels) in the cell membrane is a type of
biology
The study of the living world is
Organelle to cell to tissue to organ to organ system to organism
This sequence illustrates the increasing complexity of levels of organization in multicellular organisms
protien
Three days after and organism eats some meat many of the organic molecules originally contianed in the meat would be found in newly formed molecules of
pH and temperature
What are two internal environmental factors that directly influence the rate of enzyme action.
living things respond to their environment
What characteristic of living things explains why birds fly south for the winter
Catalysts lower the activation energy of a chemical reaction
What does a catalyst do?
Adhesion
What is the property of water that causes water to curve at the sides when in ad graduated cylinder?
My dog apparently
What kind of dog eats cat food?
It is a general statement that is supported by many scientific observations
Which statement best describes a scientific theiory?
Find adjustment
While doing a specimen under high power of a compound light microscope a student noticed that the specimen was out of focus. Which part of the microscope should the student turn to obtain a clear image under high power?
shape determines function
Why does changing the shape of an enzyme possibly affect the ability of the enzyme to function?
hypothesis
You state that the presence of water could accelerate the growth of bread mold. this is an example of a(an)
sharing an electron pair
a covalent bond is formed as the result of
acidic
a solution with a high concentration of H+ ions has a pH that is very
a base
a substance with a pH of 9.2 is called
electrons
an ion is formed when an atom gains or loses
release energy from nutrients
certain poisons are toxic to organisms because they interfere with the function of enzymes in mitochondria. This results directly in the inability of the cell to
breaking and forming chemical bonds
chemical reactions change substances into different substances by
occur spontaneously
chemical reactions that release energy often
cell membrane
controls the movement into and out of the cell
rough endoplasmic reticulum
modifies proteins and contains attached ribosomes
homeostasis
organisms undergo constant chemical changes as they maintain an internal balance
mitochondria
releases energy for life functions
data from repeated trials of the experiment
researchers preforming a well designed experiment should base their conclusion on
nucleus
serves as the control center for most cell processes and contains hereditary information
ribosome
site of protein production
pepe
tfghhgc
proteins
the cell membrane contains channels and pumps that help move materials froma one side to the oter. What are these channels and pumps made of?
all existing cells are produced by other living cells
the cell theory states that all organisms are made of cells; cells are the most basic unit of life; aaannnnnddd
enzymes that clot the blood
the failure to regrulate the ph of the blood can affect the activity of
support and protect the cell
the main function of the cell wall is to
nucleus
unlike a eukaryotic cell, a prokaryotic cell does not have a
cytoplasm
watery gel like material which contains many of the material s involved in cell metabolism
osmosis
what is the term fo th e diffusion of water across a semipermeable membrane
activation energy
what is the term for the amount of energy that needs to be added for a chemical reaction to start?
carbohydrates
what organic compound is the main source of energy for living things?/
valence
what type of electron is available to form bonds
in both directions
when the concentration of molecules on both sides of a membrane is the same , the molecutls will move across the membrane
these chemicals must have a specific shape
which condition is necessary for enzymes and hormones to function properly in the human body?
fluid mosaic model
which model did scientists develop to describe the cell membrane
ribosome
which organelle makes protins using coded instructions that come from the nucleus
3
which phrase best describes the property of selective permeability 1. all molecules pass 2. all ions pass 3.some molecules pass 4.large molecules pass
active transport
which process uses proteins to move molecules against a concentration gradient
4
which statement concerning protins is not correct? (choose one) 1. protiens are long,usually folded, chains 2.the shape of a protein molecule determines its function 3.protins can be broken down into monomers called amino acids 4.proteins are bonded together resulting in simple sugars