Lecture Exam 1

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Question #1

The smooth endoplasmic reticulum contributes to the detoxification of drugs and harmful chemicals.

A True

B False

Question #2

There is no nucleus during prophase in the cell life cycle.

A False

B True

Question #3

During the “S” phase of the cell life cycle the plasma membrane separates.

A False

B True

Question #4

Chromatin is composed of DNA wound around proteins known as SNARES.

A True

B False

Question #5

The nucleolus serves as the cell’s ribosome – producing machine.

A True

B False

Question #6

Concave shape cells that provide surface area for uptake of the respiratory gases.

A Erythrocyte

B Egg

C Fibroblast

D Epithelial

Question #7

Cell that gather information.

A Neuron

B Sperm

C Fibroblast

D Macrophage

E Fat cells

Question #8

Which of the following cells fight disease?

A Macrophage

B Sperm

C Fibroblast

D Neuron

E Fat cells

Question #9

What cells store nutrients?

A Sperm

B Fibroblast

C Neuron

D Fat cells

E Macrophage

Question #10

Which of the following cells are involve in moving organs and body parts?

A Smooth and skeletal muscle cells

B Epithelial cell

C Nervous cells

D Connective cells

Question #11

Stage in the cell life cycle where the cell is metabolically active – grow – make proteins.

A G 2 phase or Gap 2 phase

B S “Synthesis” phase

C G1 phase or Gap 1 phase

D Mitosis

Question #12

Centrosomes of chromosomes split moving to the opposite poles of the cell.

A anaphase

B metaphase

C telophase

D prophase

Question #13

A new nuclear membrane forms.

A metaphase

B telophase

C anaphase

D prophase

Question #14

Chromatin threads condense into chromosomes, and the nuclear envelope and nucleus disappear.

A prophase

B metaphase

C anaphase

D telophase

Question #15

Chromosomes are line up in the middle of the cell during _______________.

A telophase

B metaphase

C anaphase

D prophase

Question #16

Which is not part of interphase?

A S “Synthesis” phase

B G 2 phase or Gap 2 phase

C G1 phase or Gap 1 phase

D Mitosis

Question #17

Mitosis refers only to nuclear division. Separation of the entire cell following mitosis is ________________________.

A cytokinesis

B karyokinetic

C meiosis

D telophase

Question #18

Final preparations for nuclear division are made during this stage of the cell life cycle, centrioles finish copying themselves, and enzymes needed for cell division are synthesized.

A G1 phase or Gap 1 phase

B S “Synthesis” phase

C G 2 phase or Gap 2 phase

D mitosis

Question #19

In the cell life cycle, DNA is replicated (duplicated) during _______________.

A Mitosis

B G1 phase or Gap 1 phase

C G 2 phase or Gap 2 phase

D S “Synthesis” phase

Question #20

In chromatin, the DNA molecule wraps around proteins called

A codons

B histones

C nucleotides

D integral protein

Question #21

Ribosomes may be either free within the cytoplasm or bound to a channeling system known as the _______________________.

A rough endoplasmic reticulum

B Golgi apparatus

C cytoskeleton

D microtubule organizing center

Question #22

Which organelle is necessary for karyokinesis (nuclear division)?

A plasma membrane

B microtubules

C nucleolus

D centrioles

Question #23

Which of the following is not a cytoskeleton element?

A centrioles

B microfilaments

C microtubules

D intermediate filaments

Question #24

Site of ribosomes subunits manufacture

A rough endoplasmic reticulum

B smooth endoplasmic reticulum

C nucleolus

D nucleus

Question #25

Function of the Golgi apparatus include all of the following except

A DNA replication

B Package proteins

C Sort proteins for secretion from the cell

D Modify proteins

Question #26

Cell organelle responsible for transmitting genetic information and providing the instructions for protein synthesis.

A Nucleolus

B Chromatin

C Nucleus

D Ribosomes

Question #27

Which of the following organelles is associated with protein synthesis?

A Smooth endoplasmic reticulum

B Chloroplast

C Ribosomes

D Mitochondrion

Question #28

Directs cellular activities by mean of genes located here.

A Nucleus

B Nucleolus

C Ribosomes

D Smooth endoplasmic reticulum

Question #29

Site of lipid and steroids synthesis.

A Smooth endoplasmic reticulum

B Rough endoplasmic reticulum

C Ribosomes

D Nucleus

Question #30

What organelle digest unwanted substances by the action of digestive enzymes?

A Golgi apparatus

B Endoplasmic reticulum

C Peroxisomes

D Lysosome

Question #31

Organelle that generates most of the cell energy through an aerobic process called cellular respiration.

A Endoplasmic reticulum

B Lysosome

C Peroxisomes

D Mitochondrion

Question #32

Which organelle is important in neutralizing free radicals and breakdown poisons?

A Mitochondrion

B Peroxisomes

C Lysosome

D Golgi apparatus

Question #33

Products of glands are secreted by ________________.

A Phagocytosis

B Osmosis

C Pinocytosis

D Exocytosis

Question #34

Endocytosis process which engulf the most specific type of molecules or materials within the cell “cell eating”. This is the method by which insulin and cholesterol enter cells.

A Receptor-mediated endocytosis

B Fluid-phase endocytosis

C Exocytosis

D Pinocytosis

Question #35

Endocytosis process in which tiny packets of fluid are brought into the cell “cell drinking”.

A Phagocytosis

B Exocytosis

C Receptor-mediated endocytosis

D Pinocytosis

Question #36

The synthesis of complex molecules from simple ones often requires energy.

A Anabolism

B Chemical reactions

C Catabolism

D Metabolism

Question #37

The sum of all chemical reactions.

A Catabolism

B Anabolism

C Energy

D Metabolism

Question #38

The breakdown of complex molecules to simple ones that usually releases energy.

A Anabolism

B chemical reactions

C Metabolism

D Catabolism

Question #39

Molecule known as “decoder” because transfer amino acids during protein synthesis.

A DNA

B tRNA

C mRNA

D rRNA

Question #40

Molecule known as the link between a gene and a protein.

A DNA

B tRNA

C mRNA

D rRNA

Question #41

Molecules which provide stability to the plasma membrane by limiting the movement of lipids.

A Glycoproteins

B Cholesterol

C Glycolipids

D Peripheral proteins

E Integral proteins

Question #42

Function of the plasma membrane include all of the following except.

A externally facing proteins act as receptor

B regulates passage of substances to and from the nucleus

C acts as a selectively permeable membrane

D serves as an external cell barrier

Question #43

Which of the following statements best describe eukaryotic and prokaryotic cells?

A Prokaryotic cells are typically multicellular while eukaryotic cells are unicellular.

B Eukaryotic cells are more structurally complex than prokaryotic cells.

C Eukaryotic cells have less DNA than prokaryotic cells

Question #44

Trans fat is a type of unsaturated fat that is even less healthy than saturated fats.

A True

B False

Question #45

Sulphur has an atomic number of _______.

A 16

B 15

C 13

D 17

E 14

Question #46

Aluminum has __________ electrons in the outermost electron shell.

A 3

B 13

C 10

D 5

E 1

Question #47

Aluminum has an atomic number of _______.

A 11

B 15

C 14

D 10

E 13

Question #48

Fats are usually of animal origin while oils are usually of plant origin.

A False

B True

Question #49

Emulsification is the breaking up of fat globules into smaller droplets by the action of bile salts produced by the liver.

A True

B False

Question #50

A hydrolysis reaction involves the loss of water.

A True

B False

Question #51

After lunch our digestive system will use the process of hydrolysis to break the food down into smaller subunits.

A True

B False

Question #52

The presence of a buffer in our blood is an example of homeostasis.

A False

B True

Question #53

Water makes up 50 % of total body weight.

A True

B False

Question #54

An element can be broken down by chemical means.

A True

B False

Question #55

The membranes of cells are composed of _______________________.

A steroids.

B phospholipids.

C fats.

D oils.

E triglycerides.

Question #56

Sex hormones belong to which category of lipids?

A phospholipids

B oils

C fats

D triglycerides

E steroids

Question #57

A fatty acid that contains only single bonds between the carbon atoms is considered

A saturated.

B a cholestrol.

C trans unsaturated.

D a steroid.

E unsaturated.

Question #58

How are fats, oils, phospholipids, and steroids alike?

A They all contain at least one carbon ring.

B They each contain only 1 fatty acid.

C They do not dissolve in water.

D They are all solid at room temperature.

E They each contain a polar phosphate group.

Question #59

A fat contains how many fatty acids?

A 2

B 3

C 5

D 1

E 4

Question #60

Starch, cellulose, and glycogen are alike in that __________________________________.

A they have the same types of bonds between the monomer units.

B they can all be digested by our bodies.

C they contain the same number of side chains.

D they are all made of glucose.

E they are all found in animals.

Question #61

Which polysaccharide is a plant complex carbohydrate? Hint: It is in potato ?

A glucose

B glycogen

C chitin

D cellulose

E starch

Question #62

Which of the following foods would be a good source of fiber?

A apple

B berries and granola

C All of the possible options here are good sources of fiber

D pineapple

E whole wheat bread

Question #63

What passes through the digestive tract as fiber or roughage?

A Cellulose

B Glycogen

C Starch

D Maltose

E glucose

Question #64

Which polysaccharide is stored as an energy source in the body of animals?

A chitin

B cellulose

D starch

E glycogen

F glucose

Question #65

Which of the following is not a MONOSACCHARIDE?

A maltose

B galactose

C starch

D glucose

E fructose

Question #66

Which of the following is not one of the four classes of organic molecules found in cells?

A proteins

B vitamins

C carbohydrates

D lipids

E nucleic acids

Question #67

Joining small molecules (monomers) together to form longer chains (polymers) requires a process called. Hint: This process lost water.

A dehydration reaction.

B monomerization.

C emulsification.

D disassembly.

E hydrolysis reaction.

Question #68

In an acidic solution ____________________________________________.

A the number of H+ is equal to the number of OH-.

B the number of H+ is greater than the number of OH-.

C the number of H+ is 10 times less than the number of OH-.

D the number of H+ is less than the number of OH-.

E the number of H+ is 3 times less than the number of OH-.

Question #69

William noticed water mysteriously climbing up a capillary tube. This is an example of which property of water?

A The temperature of liquid water rises and falls slowly.

B Frozen water is less dense than liquid water.

C Water is a solvent.

D Water has a high heat of vaporization.

E Water molecules are cohesive.

Question #70

Bond in which one element loses electrons and other gains electrons.

A hydrogen

B covalent

C polar

D non-polar

E ionic

Question #71

Atoms that share electrons have what type of bonds?

A ionic

B colloidal

C hydrogen

D covalent

E neutral

Question #72

A combination of two or more atoms of the same type is called

A an ion.

B an isotope.

C a molecule.

D a salt.

E an atomic unit.

Question #73

Isotopes of an element differ due to the number of _______________.

A both protons and electrons

B Neutrons

C Electrons

D Neutrinos O

E Protons

Question #74

Be (Beryllium) has an atomic number of 4 and an atomic mass of 9. How many protons does it have?

A 8

B 5

C 7

D 4

E 9

Question #75

The atomic number of an atom is determined by the number of

A neutrons

B protons and neutrons

C protons.

D electrons

Question #76

How many elements occur naturally?

A 92

B 64

C 6

D 32

E 112

Question #77

In an atom, the number of protons always equals the number.

A of neutrons and protons.

B of neutrons.

C of quarks.

D of neutrinos.

E of electrons.

Question #78

The smallest unit of an element that still retains the chemical and physical properties of that element is called

A a nucleus.

B an isotope.

C a molecular bond.

D a neutrino.

E an atom.

Question #79

Which organ system mounts attack against foreign substances in the body?

A Endocrine

B Reproductive

C Lymphatic

D Nervous

E Urinary

Question #80

Large molecules such as proteins are called

A macromolecules.

B multi-atom units.

C cellular organelles.

D cells.

Question #81

Which organ system consists of vessels that do not carry blood, but pick up fluids (and some cells) that are leaked from the blood?

A lymphatic

B integumentary

C endocrine

D Cardiovascular

E urinary

Question #82

An example of an organ is

A the intestine.

B a fat cell.

C epithelium.

D the cardiovascular system (but not the circulatory system).

Question #83

An example of a tissue in the body is

A epithelium.

B a macromolecule.

C the stomach.

D a muscle cell.

Question #84

The smallest living unit is

A a molecule.

B a human being.

C an atom.

D an organ.

E a cell.

Question #85

Hormones are regulatory proteins that are secreted by the __________ system.

A Endocrine

B Lymphatic

C Skeletal

D Urinary

E Nervous

Question #86

Which organ system regulates water, electrolyte, and acid – base balance?

A Endocrine

B Respiratory

C Digestive

D Urinary

E Endocrine

Question #87

Which organ system includes the site of cutaneous receptors?

A Muscular

B Skeletal

C muscular

D Nervous

E Integumentary

Question #88

Which of the following molecules are not macromolecules?

A nucleic acis

B Carbohydrates

C Proteins

D Lipids

E Oxygen and carbon dioxide

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