Midterm Exam

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Question #1

Which is the correct order of steps in the Scientific Method?,,

A Observation, Hypothesis, Question, Experiment, Conclusion, Prediction

B Observation, Question, Hypothesis, Prediction, Experiment, Conclusion

C Observation, Hypothesis, Prediction, Experiment, Question, Conclusion

D Prediction, Hypothesis, Observation, Question, Experiment, Conclusion

Question #2

____________ prevents leaking between neighboring cells.

A Tight junctions

B Gap junctions

C ____________ prevents leaking between neighboring cells.

D Centrioles

Question #3

Where would I go to watch active cellular respiration?

A smooth endoplasmic reticulum

B lysosomes

C rough endoplasmic reticulum

D mitochondria

Question #4

Which level of protein structure involves the formation of an alpha helix or beat pleated sheet?

A Secondary structure

B Primary structure

C Tertiary structure

D Quarternary structure

Question #5

Which is true regarding unsaturated fats?

A They have double bonded carbon atoms in their fatty acids

B They are associated with animal fat

C They have a higher melting point

D All of these answers are associated with saturated fats

Question #6

Mitosis occurs in support of sexual reproduction.

A FALSE

B TRUE

Question #7

Which of the following events in meiosis specifically results in shuffling of a species’ DNA?

A All of the choices are correct

B Crossing over

C Independent assortment

D Chromosomal reduction

Question #8

Somatic cells perform a form of cell division called ____________.

A Binary division

B Meiosis

C mitosis

D Binary reduction

Question #9

Which of the following processes produces O2 as a product?

A condensation synthesis

B cell respiration

C hydrolysis

D photosynthesis

Question #10

The role of transfer RNA is to _______________.

A to copy the appropriate DNA sequence for a particular protein.

B to be a copy of a portion of the DNA molecule.

C to assemble amino acids into a polypeptide chain.

D bring the appropriate amino acids to the ribosome.

Question #11

If a cell has a higher concentration of solutes inside its fluid than its surrounding environment, the cell is in _________

A a hypertonic environment

B a hypotonic environment

C an isotonic environment

D a platonic environment

Question #12

Which of the following events in cellular respiration harvests the most electrons from glucose?

A Calvin Cycle

B Krebs Cycle

C Gycolysis

D Electron Transport Chain

Question #13

A communityis defined as a group of the same species occupying a single habitat.

A TRUE

B FALSE

Question #14

So, in terms of osmosis, what happens when you mistakingly (I hope it was a mistake) put a salt water fish into a freshwater fishtank?

A The fish is fine, it can’t change its water consumption to fit the environment

B the fish doesn’t consume enough water and probably dies

C the fish consumes too much water and probably dies

D None of the above

Question #15

What is the main function of DNA?

A to produce ATP

B to encode proteins

C to speed up cell reactions

D to provide structural support to the cell

E All of the above

Question #16

The chemotherapy drug taxol inhibits microtubule function. A cell treated with taxol would become stuck in which phase?

A prophase

B anaphase

C telophase

Question #17

In Translation, what does the translating?

A RNA polymerase

B the transfer RNA

C the ribosome

D the amino acids

Question #18

In a “silent” mutation

A the codon that mutates causes a change in the amino acid specified.

B the mutation is not in DNA.

C the codon that mutates causes a stop codon to occur instead of the placement of an amino acid.

D the codon that mutates does not cause a change in the amino acid specified.

Question #19

Many viruses are inhibited by antibiotics

A TRUE

B FALSE

Question #20

Proteins are made up of ______ different kinds of amino acid.

A 20

B 46

C hundreds of

D 4

Question #21

A chromosome is made of

A DNA

B Histones

C Chromatin

D All of the above

Question #22

The majority of a cell’s life cycle is spent in

A Interphase

B Mitosis

C Cytokinesis

D G2 phase

Question #23

How many different types of bases are used to encode all the genetic in a molecule of DNA?

A 22223

B 2

C 20

D 4

Question #24

How many codons are in the mRNA sequence GGAAUGAAACAGGAACCC?

A 3

B 0

C 6

D 18

Question #25

All mutations are harmful

A FALSE

B TRUE

Question #26

Which organelle is responsible for the synthesis of lipids?

A Rough endoplasmic reticulum

B The nucleus

C Mitochondrion

D Smooth endoplasmic reticulum

Question #27

Which organelle is responsible for the making of ribosomes?

A Lysosome

B Nucleolus

C Rough endoplasmic reticulum

D Golgi apparatus

Question #28

Which color of light is least used as an energy source to power photosynthesis?

A Yellow

B Blue

C Green

D Red

Question #29

CAM photosynthesis is a special process that evolved in those plants that live in cooler, more low light conditions.

A TRUE

B FALSE

Question #30

Cell membranes are semipermeable, as water is not allowed to pass through them freely.

A TRUE

B FALSE

Question #31

Cellular respiration of one molecule of glucose ultimately yields 136 molecules of ATP

A TRUE

B FALSE

Question #32

Plants perform photosynthesis but not cellular respiration.

A TRUE

B FALSE

Question #33

Plant cells function best when in a hypotonic environment.

A TRUE

B FALSE

Question #34

In plants, Photosystem II is known as the “NADPH-producing Photosystem”

A FALSE

B TRUE

Question #35

Which of the following is the correct order of the three stages of aerobic respiration?

A krebs cycle, glycolysis, electron transport

B glycolysis, krebs cycle, electron transport chain

C electron transport chain, krebs cycle, glycolysis

D electron transport, glycolysis, krebs cycle

Question #36

A ball at the top of a hill is an example of______ and a ball rolling down the hill is an example of ______.

A noncompetitive inhibition; competitive inhibition

B exergonic reaction; endergonic reaction

C kinetic energy; potential energy

D potential energy; kinetic energy

Question #37

How many of the following organelles occur in your skin cells: mitochondria, ribosomes, nucleus, lysosomes, chloroplasts, vacuole, ER

A 3

B 4

C 5

D 7

E 1

F 6

Question #38

Entropy is

A simplicity

B disorder

C order

D complexity

Question #39

Electrons orbit the nucleus because _______________.

A It’s a trick question–electrons don’t orbit the nucleus.

B of the negative-charged protons

C of the positively-charged protons

D of the negatively-charged neutrons–like attracts like

Question #40

Organic molecules are typically polymers.

A TRUE

B FALSE

Question #41

Theatomic mass of an atom only refers to the total number of protons in the nucleus.

A FALSE

B TRUE

Question #42

The body uses ____________ to maintain a constant pH.

A Carbon dioxide

B Buffers

C Lipids

D Water

Question #43

Within a single cell, which of the following is physically the smallest ?

A Nuclear envelope

B Cell membrane

C Mitochondrion

D Phospholipid molecule

Question #44

Isotopes are elements that vary in their number of neutrons.

A TRUE

B FALSE

Question #45

Beryllium’s atomic mass is 9 and its atomic number is 4. How many neutrons are found in a Beryllium atom?

A 5

B 13

C 14

D 9

Question #46

Which phase of mitosis involves the lining up of the chromosomes?

A Anaphase

B Telophase

C Metaphase

D Prophase

Question #47

Which of the following processes produces O2 as a product?

A condensation synthesis

B hydrolysis

C photosynthesis

D cell respiration

Question #48

_____________ are found in plant cells but not animal cells.

A Central water vacuoles

B Cell membranes

C Mitochondria

D Rough endoplasmic reticula

Question #49

Which of the following is the smallest unit of life?

A The organelle

B The cell

C The organic molecule (like DNA)

D The organism

Question #50

Which of the following is an example of an electron carrier (transport) molecule?

A NADH

B ATP

C Glucose

D Acetyl-CoA

Question #51

Which organelle is specifically associated with photosynthesis?

A Mitochondria

B Ribosomes

C Centrosomes

D Chloroplasts

Question #52

Which of the following events in cellular respiration produces the most ATP?

A Gycolysis

B Krebs Cycle

C Electron Transport Chain

D Calvin Cycle

Question #53

Which of the following does not occur during prophase?

A The condensation of the chromosomes

B Formation of the nuclear membrane

C The initial formation of the spindle fibers

D None of the above (all occur during prophase)

E None of the above (all occur during prophase)

Question #54

Which is produced when your muscles enter into anaerobic respiration?

A ATP

B Both Lactic acid and ATP

C Lactic acid

D Sugar

Question #55

Where would I go to watch active protein synthesis?

A mitochondria

B smooth endoplasmic reticulum

C lysosomes

D rough endoplasmic reticulum

Question #56

The role of messenger RNA is to _______________.

A bring the appropriate amino acids to the ribosome.

B to be a copy of a portion of the DNA molecule.

C to copy the appropriate DNA sequence for a particular protein.

D to assemble amino acids into a polypeptide chain.

Question #57

Which organelle is a principle site of cell product packaging and storage?

A Rough Endoplasmic Reticulum (ER)

B Mitochondrion

C Golgi apparatus

D Lysosome

Question #58

Cell cytoplasm is primarily composed of ___________.

A water

B carbohydrate

C lipid

D protein

Question #59

If a cell has a lower concentration of solutes inside it’s fluid than its surrounding environment, the cell is in _________

A an isotonic environment

B a hypotonic environment

C a hypertonic environment

D a platonic environment

Question #60

Enzymes function by increasing the energy of activation of a chemical reaction so that the reaction can go faster.

A TRUE

B FALSE

Question #61

Which is true regarding saturated fats?

A They lack double bonded carbon atoms in their fatty acids

B They have a higher melting point

C They are associated with animal fat

D All these answers are associated with saturated fats

Question #62

Which of the following is an example of an element?

A Water

B Salt

C Carbon

D Glucose

Question #63

An atom with a positive charge has

A more protons than electrons

B more neutrons than protons

C equal numbers of protons, electrons, and neutrons

D more electrons than protons

Question #64

Which type of chemical bond involves the sharing of electrons in the outer shells of atoms?

A Hydrogen bonds

B Covalent bonds

C James Bonds

D Ionic bonds

Question #65

Which two levels are farthest apart on the hierarchy of biological organization ?

A Tissue and organ

B Atom and Cell

C Ecosystem and biosphere

D Organism and population

Question #66

Which of the following is properly characterized as a producer?

A An eagle

B A mushroom

C An oak tree

D Both a mushroom and an oak tree

Question #67

Which of the following is not a characteristic of all living organisms?

A Multicellularity

B Homeostasis

C Order

D Energy Utilization

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