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 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 Fibroblast

B Epithelial

C Egg

D Erythrocyte

Question #7

Cell that gather information.

A Fat cells

B Neuron

C Sperm

D Fibroblast

E Macrophage

Question #8

Which of the following cells fight disease?

A Fibroblast

B Neuron

C Sperm

D Fat cells

E Macrophage

Question #9

What cells store nutrients?

A Macrophage

B Fibroblast

C Neuron

D Fat cells

E Sperm

Question #10

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

A Nervous cells

B Epithelial cell

C Connective cells

D Smooth and skeletal muscle cells

Question #11

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

A S “Synthesis” phase

B G1 phase or Gap 1 phase

C Mitosis

D G 2 phase or Gap 2 phase

Question #12

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

A anaphase

B prophase

C metaphase

D telophase

Question #13

A new nuclear membrane forms.

A metaphase

B telophase

C prophase

D anaphase

Question #14

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

A telophase

B anaphase

C metaphase

D prophase

Question #15

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

A anaphase

B prophase

C telophase

D metaphase

Question #16

Which is not part of interphase?

A G 2 phase or Gap 2 phase

B Mitosis

C G1 phase or Gap 1 phase

D S “Synthesis” phase

Question #17

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

A karyokinetic

B cytokinesis

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 G 2 phase or Gap 2 phase

B G1 phase or Gap 1 phase

C mitosis

D S “Synthesis” phase

Question #19

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

A Mitosis

B G 2 phase or Gap 2 phase

C S “Synthesis” phase

D G1 phase or Gap 1 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 microtubule organizing center

B rough endoplasmic reticulum

C cytoskeleton

D Golgi apparatus

Question #22

Which organelle is necessary for karyokinesis (nuclear division)?

A microtubules

B centrioles

C plasma membrane

D nucleolus

Question #23

Which of the following is not a cytoskeleton element?

A intermediate filaments

B microfilaments

C microtubules

D centrioles

Question #24

Site of ribosomes subunits manufacture

A rough endoplasmic reticulum

B nucleus

C smooth endoplasmic reticulum

D nucleolus

Question #25

Function of the Golgi apparatus include all of the following except

A Package proteins

B DNA replication

C Modify proteins

D Sort proteins for secretion from the cell

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 Chloroplast

B Smooth endoplasmic reticulum

C Ribosomes

D Mitochondrion

Question #28

Directs cellular activities by mean of genes located here.

A Nucleolus

B Ribosomes

C Smooth endoplasmic reticulum

D Nucleus

Question #29

Site of lipid and steroids synthesis.

A Ribosomes

B Nucleus

C Smooth endoplasmic reticulum

D Rough endoplasmic reticulum

Question #30

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

A Endoplasmic reticulum

B Lysosome

C Peroxisomes

D Golgi apparatus

Question #31

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

A Endoplasmic reticulum

B Peroxisomes

C Mitochondrion

D Lysosome

Question #32

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

A Lysosome

B Mitochondrion

C Peroxisomes

D Golgi apparatus

Question #33

Products of glands are secreted by ________________.

A Osmosis

B Exocytosis

C Phagocytosis

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 Fluid-phase endocytosis

B Exocytosis

C Receptor-mediated endocytosis

D Pinocytosis

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 Catabolism

B Metabolism

C Chemical reactions

D Anabolism

Question #37

The sum of all chemical reactions.

A Metabolism

B Anabolism

C Catabolism

D Energy

Question #38

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

A chemical reactions

B Metabolism

C Catabolism

D Anabolism

Question #39

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

A mRNA

B DNA

C rRNA

D tRNA

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 Peripheral proteins

C Glycolipids

D Glycoproteins

E Integral proteins

Question #42

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

A regulates passage of substances to and from the nucleus

B externally facing proteins act as receptor

C serves as an external cell barrier

D acts as a selectively permeable membrane

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 False

B True

Question #45

Sulphur has an atomic number of _______.

A 16

B 13

C 17

D 15

E 14

Question #46

Aluminum has __________ electrons in the outermost electron shell.

A 3

B 1

C 10

D 5

E 13

Question #47

Aluminum has an atomic number of _______.

A 11

B 14

C 15

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 False

B True

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 False

B True

Question #52

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

A True

B False

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 oils.

B phospholipids.

C triglycerides.

D steroids.

E fats.

Question #56

Sex hormones belong to which category of lipids?

A triglycerides

B phospholipids

C steroids

D fats

E oils

Question #57

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

A a steroid.

B saturated.

C a cholestrol.

D trans unsaturated.

E unsaturated.

Question #58

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

A They are all solid at room temperature.

B They all contain at least one carbon ring.

C They do not dissolve in water.

D They each contain only 1 fatty acid.

E They each contain a polar phosphate group.

Question #59

A fat contains how many fatty acids?

A 5

B 3

C 4

D 1

E 2

Question #60

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

A they contain the same number of side chains.

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

C they can all be digested by our bodies.

D they are all found in animals.

E they are all made of glucose.

Question #61

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

A glycogen

B cellulose

C glucose

D chitin

E starch

Question #62

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

A apple

B pineapple

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

D whole wheat bread

E berries and granola

Question #63

What passes through the digestive tract as fiber or roughage?

A Starch

B Glycogen

C Cellulose

D glucose

E Maltose

Question #64

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

B starch

C chitin

D glucose

E glycogen

F cellulose

Question #65

Which of the following is not a MONOSACCHARIDE?

A galactose

B starch

C glucose

D fructose

E maltose

Question #66

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

A lipids

B nucleic acids

C proteins

D vitamins

E carbohydrates

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 hydrolysis reaction.

D dehydration reaction.

E emulsification.

Question #68

In an acidic solution ____________________________________________.

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

B the number of H+ is 10 times 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 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 Water has a high heat of vaporization.

B Water is a solvent.

C Frozen water is less dense than liquid water.

D The temperature of liquid water rises and falls slowly.

E Water molecules are cohesive.

Question #70

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

A covalent

B polar

C hydrogen

D non-polar

E ionic

Question #71

Atoms that share electrons have what type of bonds?

A covalent

B hydrogen

C ionic

D neutral

E colloidal

Question #72

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

A a molecule.

B an atomic unit.

C a salt.

D an ion.

E an isotope.

Question #73

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

A Protons

B both protons and electrons

C Electrons

D Neutrons

E Neutrinos O

Question #74

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

A 7

B 4

C 8

D 9

E 5

Question #75

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

A electrons

B neutrons

C protons and neutrons

D protons.

Question #76

How many elements occur naturally?

A 32

B 112

C 92

D 6

E 64

Question #77

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

A of neutrons.

B of quarks.

C of neutrinos.

D of electrons.

E of neutrons and protons.

Question #78

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

A an isotope.

B an atom.

C a nucleus.

D a molecular bond.

E a neutrino.

Question #79

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

A Lymphatic

B Urinary

C Endocrine

D Nervous

E Reproductive

Question #80

Large molecules such as proteins are called

A cellular organelles.

B multi-atom units.

C cells.

D macromolecules.

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 integumentary

B urinary

C Cardiovascular

D endocrine

E lymphatic

Question #82

An example of an organ is

A epithelium.

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

C the intestine.

D a fat cell.

Question #83

An example of a tissue in the body is

A a muscle cell.

B a macromolecule.

C epithelium.

D the stomach.

Question #84

The smallest living unit is

A a molecule.

B an organ.

C an atom.

D a human being.

E a cell.

Question #85

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

A Urinary

B Lymphatic

C Nervous

D Endocrine

E Skeletal

Question #86

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

A Respiratory

B Endocrine

C Urinary

D Endocrine

E Digestive

Question #87

Which organ system includes the site of cutaneous receptors?

A Muscular

B muscular

C Integumentary

D Nervous

E Skeletal

Question #88

Which of the following molecules are not macromolecules?

A nucleic acis

B Carbohydrates

C Lipids

D Oxygen and carbon dioxide

E Proteins

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