Lecture Exam 1

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Question #1

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

A False

B True

Question #2

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

A True

B False

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 False

B True

Question #6

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

A Egg

B Epithelial

C Erythrocyte

D Fibroblast

Question #7

Cell that gather information.

A Macrophage

B Fibroblast

C Sperm

D Fat cells

E Neuron

Question #8

Which of the following cells fight disease?

A Fat cells

B Fibroblast

C Macrophage

D Sperm

E Neuron

Question #9

What cells store nutrients?

A Macrophage

B Fat cells

C Neuron

D Sperm

E Fibroblast

Question #10

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

A Smooth and skeletal muscle cells

B Nervous cells

C Epithelial cell

D Connective cells

Question #11

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

A G1 phase or Gap 1 phase

B G 2 phase or Gap 2 phase

C Mitosis

D S “Synthesis” phase

Question #12

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

A telophase

B anaphase

C metaphase

D prophase

Question #13

A new nuclear membrane forms.

A metaphase

B anaphase

C telophase

D prophase

Question #14

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

A metaphase

B anaphase

C telophase

D prophase

Question #15

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

A telophase

B prophase

C metaphase

D anaphase

Question #16

Which is not part of interphase?

A G1 phase or Gap 1 phase

B Mitosis

C S “Synthesis” phase

D G 2 phase or Gap 2 phase

Question #17

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

A meiosis

B karyokinetic

C cytokinesis

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 G 2 phase or Gap 2 phase

B mitosis

C S “Synthesis” phase

D G1 phase or Gap 1 phase

Question #19

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

A S “Synthesis” phase

B G1 phase or Gap 1 phase

C G 2 phase or Gap 2 phase

D Mitosis

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 microtubule organizing center

C cytoskeleton

D Golgi apparatus

Question #22

Which organelle is necessary for karyokinesis (nuclear division)?

A centrioles

B nucleolus

C plasma membrane

D microtubules

Question #23

Which of the following is not a cytoskeleton element?

A intermediate filaments

B centrioles

C microfilaments

D microtubules

Question #24

Site of ribosomes subunits manufacture

A nucleus

B rough endoplasmic reticulum

C smooth endoplasmic reticulum

D nucleolus

Question #25

Function of the Golgi apparatus include all of the following except

A Modify proteins

B Sort proteins for secretion from the cell

C DNA replication

D Package proteins

Question #26

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

A Ribosomes

B Nucleolus

C Chromatin

D Nucleus

Question #27

Which of the following organelles is associated with protein synthesis?

A Chloroplast

B Mitochondrion

C Ribosomes

D Smooth endoplasmic reticulum

Question #28

Directs cellular activities by mean of genes located here.

A Nucleolus

B Smooth endoplasmic reticulum

C Ribosomes

D Nucleus

Question #29

Site of lipid and steroids synthesis.

A Nucleus

B Rough endoplasmic reticulum

C Ribosomes

D Smooth endoplasmic reticulum

Question #30

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

A Peroxisomes

B Golgi apparatus

C Lysosome

D Endoplasmic reticulum

Question #31

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

A Mitochondrion

B Lysosome

C Peroxisomes

D Endoplasmic reticulum

Question #32

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

A Golgi apparatus

B Peroxisomes

C Lysosome

D Mitochondrion

Question #33

Products of glands are secreted by ________________.

A Phagocytosis

B Exocytosis

C Osmosis

D Pinocytosis

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 Pinocytosis

D Exocytosis

Question #35

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

A Phagocytosis

B Receptor-mediated endocytosis

C Pinocytosis

D Exocytosis

Question #36

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

A Chemical reactions

B Anabolism

C Catabolism

D Metabolism

Question #37

The sum of all chemical reactions.

A Metabolism

B Catabolism

C Anabolism

D Energy

Question #38

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

A Metabolism

B Catabolism

C Anabolism

D chemical reactions

Question #39

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

A mRNA

B DNA

C tRNA

D rRNA

Question #40

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

A DNA

B mRNA

C tRNA

D rRNA

Question #41

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

A Cholesterol

B Glycolipids

C Glycoproteins

D Peripheral proteins

E Integral proteins

Question #42

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

A acts as a selectively permeable membrane

B externally facing proteins act as receptor

C regulates passage of substances to and from the nucleus

D serves as an external cell barrier

Question #43

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

A Eukaryotic cells have less DNA than prokaryotic cells

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

C Eukaryotic cells are more structurally complex 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 14

B 17

C 16

D 15

E 13

Question #46

Aluminum has __________ electrons in the outermost electron shell.

A 1

B 5

C 3

D 13

E 10

Question #47

Aluminum has an atomic number of _______.

A 15

B 11

C 13

D 14

E 10

Question #48

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

A True

B False

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 False

B True

Question #51

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

A False

B True

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 False

B True

Question #55

The membranes of cells are composed of _______________________.

A phospholipids.

B fats.

C oils.

D triglycerides.

E steroids.

Question #56

Sex hormones belong to which category of lipids?

A fats

B steroids

C triglycerides

D phospholipids

E oils

Question #57

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

A unsaturated.

B a steroid.

C trans unsaturated.

D a cholestrol.

E saturated.

Question #58

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

A They are all solid at room temperature.

B They do not dissolve in water.

C They each contain a polar phosphate group.

D They all contain at least one carbon ring.

E They each contain only 1 fatty acid.

Question #59

A fat contains how many fatty acids?

A 3

B 1

C 2

D 4

E 5

Question #60

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

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

B they are all found in animals.

C they are all made of glucose.

D they contain the same number of side chains.

E they can all be digested by our bodies.

Question #61

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

A chitin

B glycogen

C glucose

D starch

E cellulose

Question #62

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

A apple

B pineapple

C berries and granola

D whole wheat bread

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

Question #63

What passes through the digestive tract as fiber or roughage?

A Cellulose

B Glycogen

C Maltose

D glucose

E Starch

Question #64

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

A cellulose

B glucose

C chitin

E starch

F glycogen

Question #65

Which of the following is not a MONOSACCHARIDE?

A fructose

B maltose

C glucose

D galactose

E starch

Question #66

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

A nucleic acids

B carbohydrates

C proteins

D vitamins

E lipids

Question #67

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

A disassembly.

B monomerization.

C dehydration reaction.

D emulsification.

E hydrolysis reaction.

Question #68

In an acidic solution ____________________________________________.

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

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

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

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

E the number of H+ is greater 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 Water is a solvent.

C Frozen water is less dense than liquid water.

D Water molecules are cohesive.

E Water has a high heat of vaporization.

Question #70

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

A non-polar

B hydrogen

C polar

D ionic

E covalent

Question #71

Atoms that share electrons have what type of bonds?

A covalent

B hydrogen

C neutral

D colloidal

E ionic

Question #72

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

A an isotope.

B an ion.

C an atomic unit.

D a molecule.

E a salt.

Question #73

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

A both protons and electrons

B Electrons

C Neutrons

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 4

B 7

C 5

D 8

E 9

Question #75

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

A protons.

B electrons

C neutrons

D protons and neutrons

Question #76

How many elements occur naturally?

A 112

B 6

C 32

D 64

E 92

Question #77

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

A of neutrons and protons.

B of neutrinos.

C of electrons.

D of quarks.

E of neutrons.

Question #78

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

A an atom.

B a nucleus.

C a molecular bond.

D a neutrino.

E an isotope.

Question #79

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

A Urinary

B Lymphatic

C Endocrine

D Nervous

E Reproductive

Question #80

Large molecules such as proteins are called

A multi-atom units.

B cellular organelles.

C macromolecules.

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 urinary

C integumentary

D Cardiovascular

E endocrine

Question #82

An example of an organ is

A the intestine.

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

C epithelium.

D a fat cell.

Question #83

An example of a tissue in the body is

A epithelium.

B a muscle cell.

C a macromolecule.

D the stomach.

Question #84

The smallest living unit is

A an atom.

B a molecule.

C an organ.

D a cell.

E a human being.

Question #85

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

A Nervous

B Skeletal

C Urinary

D Endocrine

E Lymphatic

Question #86

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

A Digestive

B Endocrine

C Endocrine

D Urinary

E Respiratory

Question #87

Which organ system includes the site of cutaneous receptors?

A muscular

B Muscular

C Skeletal

D Nervous

E Integumentary

Question #88

Which of the following molecules are not macromolecules?

A Proteins

B Lipids

C Carbohydrates

D Oxygen and carbon dioxide

E nucleic acis

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