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