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, Hypothesis, Prediction, Experiment, Question, Conclusion

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

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

Question #2

____________ prevents leaking between neighboring cells.

A Gap junctions

B ____________ prevents leaking between neighboring cells.

C Tight junctions

D Centrioles

Question #3

Where would I go to watch active cellular respiration?

A lysosomes

B mitochondria

C smooth endoplasmic reticulum

D rough endoplasmic reticulum

Question #4

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

A Quarternary structure

B Tertiary structure

C Secondary structure

D Primary structure

Question #5

Which is true regarding unsaturated fats?

A They have a higher melting point

B They have double bonded carbon atoms in their fatty acids

C They are associated with animal fat

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 Independent assortment

B All of the choices are correct

C Crossing over

D Chromosomal reduction

Question #8

Somatic cells perform a form of cell division called ____________.

A Meiosis

B Binary division

C Binary reduction

D mitosis

Question #9

Which of the following processes produces O2 as a product?

A hydrolysis

B condensation synthesis

C photosynthesis

D cell respiration

Question #10

The role of transfer 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 assemble amino acids into a polypeptide chain.

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

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 an isotonic environment

C a hypotonic environment

D a platonic environment

Question #12

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

A Gycolysis

B Calvin Cycle

C Electron Transport Chain

D Krebs Cycle

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 consumes too much water and probably dies

C the fish doesn’t consume enough 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 provide structural support to the cell

D to speed up cell reactions

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 anaphase

B prophase

C telophase

Question #17

In Translation, what does the translating?

A the transfer RNA

B the ribosome

C RNA polymerase

D the amino acids

Question #18

In a “silent” mutation

A the mutation is not in DNA.

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

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 FALSE

B TRUE

Question #20

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

A hundreds of

B 4

C 46

D 20

Question #21

A chromosome is made of

A Chromatin

B DNA

C Histones

D All of the above

Question #22

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

A Interphase

B G2 phase

C Cytokinesis

D Mitosis

Question #23

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

A 4

B 2

C 22223

D 20

Question #24

How many codons are in the mRNA sequence GGAAUGAAACAGGAACCC?

A 6

B 3

C 18

D 0

Question #25

All mutations are harmful

A TRUE

B FALSE

Question #26

Which organelle is responsible for the synthesis of lipids?

A The nucleus

B Mitochondrion

C Smooth endoplasmic reticulum

D Rough endoplasmic reticulum

Question #27

Which organelle is responsible for the making of ribosomes?

A Nucleolus

B Golgi apparatus

C Rough endoplasmic reticulum

D Lysosome

Question #28

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

A Blue

B Red

C Green

D Yellow

Question #29

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

A FALSE

B TRUE

Question #30

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

A FALSE

B TRUE

Question #31

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

A FALSE

B TRUE

Question #32

Plants perform photosynthesis but not cellular respiration.

A FALSE

B TRUE

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 electron transport, glycolysis, krebs cycle

B krebs cycle, glycolysis, electron transport

C electron transport chain, krebs cycle, glycolysis

D glycolysis, krebs cycle, electron transport chain

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 kinetic energy; potential energy

B potential energy; kinetic energy

C exergonic reaction; endergonic reaction

D noncompetitive inhibition; competitive inhibition

Question #37

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

A 5

B 4

C 6

D 3

E 1

F 7

Question #38

Entropy is

A complexity

B disorder

C simplicity

D order

Question #39

Electrons orbit the nucleus because _______________.

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

B of the negatively-charged neutrons–like attracts like

C of the negative-charged protons

D of the positively-charged protons

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 Buffers

B Water

C Lipids

D Carbon dioxide

Question #43

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

A Nuclear envelope

B Phospholipid molecule

C Cell membrane

D Mitochondrion

Question #44

Isotopes are elements that vary in their number of neutrons.

A FALSE

B TRUE

Question #45

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

A 9

B 13

C 5

D 14

Question #46

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

A Metaphase

B Prophase

C Anaphase

D Telophase

Question #47

Which of the following processes produces O2 as a product?

A cell respiration

B condensation synthesis

C photosynthesis

D hydrolysis

Question #48

_____________ are found in plant cells but not animal cells.

A Cell membranes

B Central water vacuoles

C Rough endoplasmic reticula

D Mitochondria

Question #49

Which of the following is the smallest unit of life?

A The organic molecule (like DNA)

B The organism

C The cell

D The organelle

Question #50

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

A NADH

B Glucose

C Acetyl-CoA

D ATP

Question #51

Which organelle is specifically associated with photosynthesis?

A Ribosomes

B Centrosomes

C Chloroplasts

D Mitochondria

Question #52

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

A Krebs Cycle

B Gycolysis

C Electron Transport Chain

D Calvin Cycle

Question #53

Which of the following does not occur during prophase?

A Formation of the nuclear membrane

B The initial formation of the spindle fibers

C The condensation of the chromosomes

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 Sugar

B Both Lactic acid and ATP

C ATP

D Lactic acid

Question #55

Where would I go to watch active protein synthesis?

A lysosomes

B smooth endoplasmic reticulum

C mitochondria

D rough endoplasmic reticulum

Question #56

The role of messenger RNA is to _______________.

A to assemble amino acids into a polypeptide chain.

B bring the appropriate amino acids to the ribosome.

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

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

Question #57

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

A Mitochondrion

B Golgi apparatus

C Lysosome

D Rough Endoplasmic Reticulum (ER)

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 a hypertonic environment

B a platonic environment

C a hypotonic environment

D an isotonic 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 All these answers are associated with saturated fats

B They lack double bonded carbon atoms in their fatty acids

C They have a higher melting point

D They are associated with animal fat

Question #62

Which of the following is an example of an element?

A Salt

B Carbon

C Glucose

D Water

Question #63

An atom with a positive charge has

A more neutrons than protons

B equal numbers of protons, electrons, and neutrons

C more protons than electrons

D more electrons than protons

Question #64

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

A James Bonds

B Hydrogen bonds

C Covalent bonds

D Ionic bonds

Question #65

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

A Ecosystem and biosphere

B Tissue and organ

C Organism and population

D Atom and Cell

Question #66

Which of the following is properly characterized as a producer?

A Both a mushroom and an oak tree

B An oak tree

C An eagle

D A mushroom

Question #67

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

A Order

B Energy Utilization

C Multicellularity

D Homeostasis

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