Midterm Exam

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Question #1

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

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

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

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

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

Question #2

____________ prevents leaking between neighboring cells.

A Centrioles

B ____________ prevents leaking between neighboring cells.

C Tight junctions

D Gap junctions

Question #3

Where would I go to watch active cellular respiration?

A rough endoplasmic reticulum

B smooth endoplasmic reticulum

C mitochondria

D lysosomes

Question #4

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

A Tertiary structure

B Primary structure

C Secondary structure

D Quarternary structure

Question #5

Which is true regarding unsaturated fats?

A They have double bonded carbon atoms in their fatty acids

B All of these answers are associated with saturated fats

C They have a higher melting point

D They are associated with animal fat

Question #6

Mitosis occurs in support of sexual reproduction.

A TRUE

B FALSE

Question #7

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

A Chromosomal reduction

B Independent assortment

C Crossing over

D All of the choices are correct

Question #8

Somatic cells perform a form of cell division called ____________.

A mitosis

B Binary division

C Meiosis

D Binary reduction

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 to assemble amino acids into a polypeptide chain.

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

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

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 an isotonic environment

C a platonic environment

D a hypotonic environment

Question #12

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

A Calvin Cycle

B Electron Transport Chain

C Krebs Cycle

D Gycolysis

Question #13

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

A FALSE

B TRUE

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 doesn’t consume enough water and probably dies

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

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 provide structural support to the cell

B to encode proteins

C to produce ATP

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 amino acids

B RNA polymerase

C the ribosome

D the transfer RNA

Question #18

In a “silent” mutation

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

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

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

D the mutation is not in DNA.

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 20

C 46

D 4

Question #21

A chromosome is made of

A Histones

B DNA

C Chromatin

D All of the above

Question #22

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

A Interphase

B G2 phase

C Mitosis

D Cytokinesis

Question #23

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

A 20

B 4

C 22223

D 2

Question #24

How many codons are in the mRNA sequence GGAAUGAAACAGGAACCC?

A 0

B 18

C 6

D 3

Question #25

All mutations are harmful

A FALSE

B TRUE

Question #26

Which organelle is responsible for the synthesis of lipids?

A Mitochondrion

B Smooth endoplasmic reticulum

C The nucleus

D Rough endoplasmic reticulum

Question #27

Which organelle is responsible for the making of ribosomes?

A Nucleolus

B Golgi apparatus

C Lysosome

D Rough endoplasmic reticulum

Question #28

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

A Green

B Blue

C Yellow

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 FALSE

B TRUE

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 FALSE

B TRUE

Question #33

Plant cells function best when in a hypotonic environment.

A FALSE

B TRUE

Question #34

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

A TRUE

B FALSE

Question #35

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

A electron transport chain, krebs cycle, glycolysis

B electron transport, glycolysis, krebs cycle

C glycolysis, krebs cycle, electron transport chain

D krebs cycle, glycolysis, electron transport

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 exergonic reaction; endergonic reaction

C noncompetitive inhibition; competitive inhibition

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 7

B 5

C 6

D 1

E 4

F 3

Question #38

Entropy is

A complexity

B disorder

C order

D simplicity

Question #39

Electrons orbit the nucleus because _______________.

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

B of the positively-charged protons

C of the negatively-charged neutrons–like attracts like

D of the negative-charged protons

Question #40

Organic molecules are typically polymers.

A FALSE

B TRUE

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 Lipids

C Carbon dioxide

D Water

Question #43

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

A Cell membrane

B Nuclear envelope

C Mitochondrion

D Phospholipid molecule

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 14

B 5

C 13

D 9

Question #46

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

A Metaphase

B Prophase

C Telophase

D Anaphase

Question #47

Which of the following processes produces O2 as a product?

A hydrolysis

B condensation synthesis

C photosynthesis

D cell respiration

Question #48

_____________ are found in plant cells but not animal cells.

A Mitochondria

B Central water vacuoles

C Cell membranes

D Rough endoplasmic reticula

Question #49

Which of the following is the smallest unit of life?

A The cell

B The organic molecule (like DNA)

C The organism

D The organelle

Question #50

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

A NADH

B ATP

C Acetyl-CoA

D Glucose

Question #51

Which organelle is specifically associated with photosynthesis?

A Chloroplasts

B Ribosomes

C Mitochondria

D Centrosomes

Question #52

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

A Gycolysis

B Electron Transport Chain

C Krebs Cycle

D Calvin Cycle

Question #53

Which of the following does not occur during prophase?

A The condensation of the chromosomes

B The initial formation of the spindle fibers

C Formation of the nuclear membrane

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 Both Lactic acid and ATP

B Lactic acid

C Sugar

D ATP

Question #55

Where would I go to watch active protein synthesis?

A rough endoplasmic reticulum

B lysosomes

C smooth endoplasmic reticulum

D mitochondria

Question #56

The role of messenger RNA is to _______________.

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

B to assemble amino acids into a polypeptide chain.

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

D bring the appropriate amino acids to the ribosome.

Question #57

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

A Lysosome

B Mitochondrion

C Golgi apparatus

D Rough Endoplasmic Reticulum (ER)

Question #58

Cell cytoplasm is primarily composed of ___________.

A lipid

B carbohydrate

C protein

D water

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 They have a higher melting point

B They are associated with animal fat

C They lack double bonded carbon atoms in their fatty acids

D All these answers are associated with saturated fats

Question #62

Which of the following is an example of an element?

A Carbon

B Salt

C Glucose

D Water

Question #63

An atom with a positive charge has

A more neutrons than protons

B more protons than electrons

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 James Bonds

C Ionic bonds

D Covalent bonds

Question #65

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

A Tissue and organ

B Organism and population

C Atom and Cell

D Ecosystem and biosphere

Question #66

Which of the following is properly characterized as a producer?

A Both a mushroom and an oak tree

B A mushroom

C An eagle

D An oak tree

Question #67

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

A Multicellularity

B Energy Utilization

C Order

D Homeostasis

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