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 False

B True

Question #6

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

A Fibroblast

B Erythrocyte

C Egg

D Epithelial

Question #7

Cell that gather information.

A Macrophage

B Sperm

C Fat cells

D Fibroblast

E Neuron

Question #8

Which of the following cells fight disease?

A Sperm

B Fibroblast

C Neuron

D Macrophage

E Fat cells

Question #9

What cells store nutrients?

A Macrophage

B Fibroblast

C Sperm

D Neuron

E Fat cells

Question #10

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

A Nervous cells

B Smooth and skeletal muscle cells

C Connective cells

D Epithelial cell

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 Mitosis

C G 2 phase or Gap 2 phase

D S “Synthesis” phase

Question #12

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

A prophase

B anaphase

C telophase

D metaphase

Question #13

A new nuclear membrane forms.

A metaphase

B anaphase

C prophase

D telophase

Question #14

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

A telophase

B anaphase

C prophase

D metaphase

Question #15

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

A prophase

B telophase

C anaphase

D metaphase

Question #16

Which is not part of interphase?

A G1 phase or Gap 1 phase

B G 2 phase or Gap 2 phase

C S “Synthesis” phase

D Mitosis

Question #17

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

A telophase

B meiosis

C karyokinetic

D cytokinesis

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 mitosis

C G 2 phase or Gap 2 phase

D S “Synthesis” phase

Question #19

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

A G1 phase or Gap 1 phase

B S “Synthesis” phase

C Mitosis

D G 2 phase or Gap 2 phase

Question #20

In chromatin, the DNA molecule wraps around proteins called

A integral protein

B codons

C nucleotides

D histones

Question #21

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

A cytoskeleton

B microtubule organizing center

C Golgi apparatus

D rough endoplasmic reticulum

Question #22

Which organelle is necessary for karyokinesis (nuclear division)?

A nucleolus

B centrioles

C plasma membrane

D microtubules

Question #23

Which of the following is not a cytoskeleton element?

A microfilaments

B centrioles

C intermediate filaments

D microtubules

Question #24

Site of ribosomes subunits manufacture

A nucleus

B nucleolus

C rough endoplasmic reticulum

D smooth endoplasmic reticulum

Question #25

Function of the Golgi apparatus include all of the following except

A DNA replication

B Modify proteins

C Sort proteins for secretion from the cell

D Package proteins

Question #26

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

A Nucleus

B Chromatin

C Ribosomes

D Nucleolus

Question #27

Which of the following organelles is associated with protein synthesis?

A Ribosomes

B Chloroplast

C Smooth endoplasmic reticulum

D Mitochondrion

Question #28

Directs cellular activities by mean of genes located here.

A Nucleolus

B Smooth endoplasmic reticulum

C Nucleus

D Ribosomes

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 Lysosome

B Peroxisomes

C Golgi apparatus

D Endoplasmic reticulum

Question #31

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

A Lysosome

B Endoplasmic reticulum

C Peroxisomes

D Mitochondrion

Question #32

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

A Golgi apparatus

B Mitochondrion

C Lysosome

D Peroxisomes

Question #33

Products of glands are secreted by ________________.

A Phagocytosis

B Pinocytosis

C Osmosis

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 Pinocytosis

C Exocytosis

D Fluid-phase endocytosis

Question #35

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

A Exocytosis

B Pinocytosis

C Phagocytosis

D Receptor-mediated endocytosis

Question #36

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

A Chemical reactions

B Catabolism

C Metabolism

D Anabolism

Question #37

The sum of all chemical reactions.

A Anabolism

B Metabolism

C Energy

D Catabolism

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 mRNA

C rRNA

D tRNA

Question #40

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

A rRNA

B mRNA

C tRNA

D DNA

Question #41

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

A Integral proteins

B Peripheral proteins

C Cholesterol

D Glycolipids

E Glycoproteins

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 Eukaryotic cells are more structurally complex than prokaryotic cells.

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

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 13

B 15

C 14

D 17

E 16

Question #46

Aluminum has __________ electrons in the outermost electron shell.

A 13

B 1

C 10

D 5

E 3

Question #47

Aluminum has an atomic number of _______.

A 10

B 14

C 13

D 15

E 11

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 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 fats.

B phospholipids.

C triglycerides.

D steroids.

E oils.

Question #56

Sex hormones belong to which category of lipids?

A oils

B steroids

C triglycerides

D phospholipids

E fats

Question #57

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

A unsaturated.

B trans unsaturated.

C a steroid.

D a cholestrol.

E saturated.

Question #58

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

A They each contain only 1 fatty acid.

B They do not dissolve in water.

C They all contain at least one carbon ring.

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 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 are all made of glucose.

D they are all found in animals.

E they can all be digested by our bodies.

Question #61

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

A glucose

B chitin

C cellulose

D glycogen

E starch

Question #62

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

A berries and granola

B pineapple

C whole wheat bread

D apple

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 Starch

B Cellulose

C glucose

D Glycogen

E Maltose

Question #64

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

B chitin

C starch

D glycogen

E glucose

F cellulose

Question #65

Which of the following is not a MONOSACCHARIDE?

A fructose

B glucose

C galactose

D starch

E maltose

Question #66

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

A carbohydrates

B proteins

C vitamins

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 disassembly.

B hydrolysis reaction.

C dehydration reaction.

D monomerization.

E emulsification.

Question #68

In an acidic solution ____________________________________________.

A the number of H+ is 3 times less 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 equal to the number of OH-.

D the number of H+ is greater than 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 is a solvent.

B Frozen water is less dense than liquid water.

C Water molecules are cohesive.

D Water has a high heat of vaporization.

E The temperature of liquid water rises and falls slowly.

Question #70

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

A polar

B hydrogen

C ionic

D covalent

E non-polar

Question #71

Atoms that share electrons have what type of bonds?

A colloidal

B neutral

C hydrogen

D covalent

E ionic

Question #72

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

A an atomic unit.

B an isotope.

C an ion.

D a molecule.

E a salt.

Question #73

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

A Electrons

B Neutrinos O

C both protons and electrons

D Neutrons

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 7

B 4

C 8

D 5

E 9

Question #75

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

A neutrons

B electrons

C protons and neutrons

D protons.

Question #76

How many elements occur naturally?

A 112

B 32

C 64

D 92

E 6

Question #77

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

A of electrons.

B of quarks.

C of neutrons and protons.

D of neutrons.

E of neutrinos.

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 atom.

C an isotope.

D a neutrino.

E a molecular bond.

Question #79

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

A Endocrine

B Nervous

C Lymphatic

D Reproductive

E Urinary

Question #80

Large molecules such as proteins are called

A cells.

B macromolecules.

C cellular organelles.

D multi-atom units.

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 Cardiovascular

D endocrine

E urinary

Question #82

An example of an organ is

A epithelium.

B the intestine.

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

D a fat cell.

Question #83

An example of a tissue in the body is

A a macromolecule.

B the stomach.

C a muscle cell.

D epithelium.

Question #84

The smallest living unit is

A a cell.

B an organ.

C a molecule.

D a human being.

E an atom.

Question #85

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

A Endocrine

B Urinary

C Lymphatic

D Nervous

E Skeletal

Question #86

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

A Endocrine

B Digestive

C Urinary

D Respiratory

E Endocrine

Question #87

Which organ system includes the site of cutaneous receptors?

A muscular

B Integumentary

C Muscular

D Skeletal

E Nervous

Question #88

Which of the following molecules are not macromolecules?

A Carbohydrates

B Proteins

C nucleic acis

D Oxygen and carbon dioxide

E Lipids

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