What is the smallest unit of life?

a. atom

b. macro-molecule

c. cell

d. tissue

Doctors notice that patients taking drug x for their migraine headaches have very low cholesterol. What would be a good hypothesis for an experiment based on the experiment?

a. Drug x decreases migraine headaches

b. Does drug x lower cholesterol

c. one group of patients should be given drug x and another should be given a placebo

d. Drug x lowers cholesterol

Using your light microscope you discover a new organism. It is unicellular and has no nucleus. It belongs to the ..

a. Domain bacteria

b. domain eukarya

c. kingdom plantae

d. Kingdom anmalia

Which of the following best describes natrual selection?

a. Unequeal reproductive success due to trait variations

b. selective breeding of domesticated plants and animals

c. a change in an animal during its lifespan

d. all of the above

Evolution

a. Is genetic change within a single generation

b. Is genetic change with a single individual

c. Is genetic change in a population

d. is a single individual with beneficial traits

The life supporting region of the earth is the

a. hypothesis

b. ecosystem

c. gene

d. biosphere

Which of the following is not a property of ALL living organisms

a. made of cells

b. growth

c. reproduction

d. herdity

e. oxygen metabolism

Who is creditied with proposing the theory of evolution by natural selection?

a. Robert Hooke

b. Gregor mendel

c. Charles Darwin

d. Sarah Palin

Members of a single species living in an area make up a/n

a. habitat

b. population

c. ecosystem

d. community

an atom with 11 protons and 10 electrons is a/n

a. molecule

b. isotope

c. acid

d. ion

Atoms are held together by a force called a bond. The type of bond that is caused when one atom gives up electrons and another gains electrons is known as a (blank) bond.

a. ionic

b. covalent

c. hydrogen

d. the strongest

Why are large inputs of enery required to change water's temperature?

a. Because Ice is more dense than liquid water

b. because the energy must be used to break hydrogen bonds first

c. because water has a pH of 3

d. Because lipids are hydrophobic

a solution with a pH of 4 has (blank) hydrogen ions when compared to a solution with a pH of 12

a. More

b. Less

c. equal number

d. no

A neutral atom has 12 protons, 13 neutrons, 12 electrons. What is the atom's atomic number?

a. 37

b. 25

c. 13

d. 12

For an atom with 12 protons, 13 neutrons, and 12 electrons, how many electrons can be found in the first electron shell?

a. none

b. 2

c. 8

d. 12

hat are the four main elements found in living things?

a. carbon, hydrogen, oxygen, nitrogen

b. water, lipids, carbohydrates, oxygen

c. calcium, fluorine, sodium, chlorine

d. Hydrogen, oxygen, nitrogen, potassium

In the following reaction, what are the reactants: glucose + oxygen -> carbon dioxide + water.

a. Carbon dioxide and water

b. oxygen and water

c. glucose and oxygen

d. glucose and carbon dioxide

Carbon 12 and carbon 13 have different numbers of neutrons. Therefore they are

a. ions

b. protons

c. molecules

d. isotopes

The tendency of water molecules to stick to each other is called

a. adhesion

b. cohesion

c. polarity

d. ionic bonding

What is the subunit (or Monomer) of proteins?

a. nucleotides

b. triglycerides

c. monosaccharides

d. Amino Acids

Which of the follow is NOT a component of nucleotides?

a. fatty acids

b. suger

c. base

d. phosphate

a. fatty acids

Which of the following is a monosaccharide?

a. galactose

b. strach

c. Enzymes

d. chorestrerol

Which of the following has a double helix structure and stores the genetic informantion?

a. saturated fats

b. DNA

c. RNA

d. Phospholipids

 Lipids are used for

a. Motion and defense

b. information storage

c. Energy storage and for some hormones

d. enzymes and for some hormones

Which of the following is true of saturated triglyceridee? 

a. They have straight fatty acid chains and they are solid at room temperature.

b. They have kinked fatty acid chains and they are liquide at room liquid at room temp.

c. they are good for you

d. they are made by plants

what type of carbohydrate forms the cell walls  of plants

a. starch

b. glycogen

c. cellulose

d. chitin

(Blank) is the process of unraveling (blank) so that they are no longer functional.

a. denaturation; proteins

b. solubility; monosaccharides

c. dehydration synthesis; proteins

d. catalysis; double helices

The four main categories of macromolecules in a cell are

a. RNA, DNA, protein, carbohydrates

b. amino acid, nucleotide, triglyceride, glucose

c. Cellulose, chitin, starch, glycogen

d. lipids, nucleic acids, proteins, carbohydrates

Which organelle is responsible for producing ATP?

a. rough endoplasmic reticulum

b. lysosomes

c. mitochondria

d. ribosomes

Cell membranes are made up of

a. A phospholipid bilayer

b. nucleotides

c. cellulose

d. triglycerides

chloroplasts

a. make proteins

b. are the site of photosynthesis

c. sort proteins

d. store digestive enzymes

Which of the following is NOT found in prokaryotic cells

a. cell membrane

b. cytoplasm

c. ribosomes

d. golgi apparatus

Which of the following is NOT found in animal cells

a. central vacuole

b. cell wall

c. chloroplasts

d. None of the above are found in animal cells

Which of the following is a human cell with a flagellum?

a. White blood cell

b. Plasma

c. Sperm

Cells of your windpipe

what is the genetic center of the eukaryotic cell?

a. Mitochondria

b. Ribosomes

c. Nucleus

d. Rought ER

The hydrophobic portion of a phospholipid

a. is protected from water in the center of the cell membrane

b. Interacts with water at the surface of the cell membrane

c. Forms bonds with water in DNA

d. Bonds adenine to guanine in DNA

(Blank) Stores the genetic info, (blank) is the working copy that is used to make (blank)

a. RNA, carbohydrate, lipid

b. DNA, RNA protein

c. Lipid, ATP, amino acids

d. RNA, protein, cellulose

Which of the following is not true of enzymes?

a. They are carbohydrates

b. they are catalysts

c. they are required for metabolism

d. They lower activation energy

Energy is release from ATP when it

a. Gains a phosphate group

b. Loses a phosphate group

c. is built

d. inceases in size

Energy exists in which of the following forms

a. mechanical

b. heat

c. light

d. chemical

e. all of the above

Which molecule is used directly for cellular energy needs?

a. glucose

b. starch

c. triglyceride

d. ATP

The reactants in enzyme-catalyzed reactions are called

a. substrates

b. products

c. catalysts

d. ribosomes

when energy changes form, some usable energy is lost as

a. sunlight

b. heat

c. motion

d. potential energy

When a molecule is broken down energy is

a. release

b. taken up

c. stored

d. destroyed

All chemical reactions require an inital input of energy to get them going. This input of energy is called

a. substrate energy

b. kinetic energy

c. activation energy

d. speedbump energy