Midterm Exam

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Question #1

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

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

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

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

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

Question #2

____________ prevents leaking between neighboring cells.

A Centrioles

B Gap junctions

C ____________ prevents leaking between neighboring cells.

D Tight junctions

Question #3

Where would I go to watch active cellular respiration?

A lysosomes

B mitochondria

C rough endoplasmic reticulum

D smooth endoplasmic reticulum

Question #4

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

A Quarternary structure

B Secondary structure

C Primary structure

D Tertiary structure

Question #5

Which is true regarding unsaturated fats?

A They are associated with animal fat

B They have a higher melting point

C All of these answers are associated with saturated fats

D They have double bonded carbon atoms in their fatty acids

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 Crossing over

B All of the choices are correct

C Independent assortment

D Chromosomal reduction

Question #8

Somatic cells perform a form of cell division called ____________.

A mitosis

B Binary division

C Binary reduction

D Meiosis

Question #9

Which of the following processes produces O2 as a product?

A hydrolysis

B cell respiration

C photosynthesis

D condensation synthesis

Question #10

The role of transfer RNA is to _______________.

A to assemble amino acids into a polypeptide chain.

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

C bring the appropriate amino acids to the ribosome.

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

Question #11

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

A a hypotonic environment

B a hypertonic 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 Electron Transport Chain

B Krebs Cycle

C Gycolysis

D Calvin Cycle

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 consumes too much water and probably dies

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

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

D None of the above

Question #15

What is the main function of DNA?

A to speed up cell reactions

B to provide structural support to the cell

C to encode proteins

D to produce ATP

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 telophase

B prophase

C anaphase

Question #17

In Translation, what does the translating?

A the ribosome

B the amino acids

C RNA polymerase

D the transfer RNA

Question #18

In a “silent” mutation

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

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

C the mutation is not in DNA.

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

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 Histones

B Chromatin

C DNA

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 4

B 20

C 22223

D 2

Question #24

How many codons are in the mRNA sequence GGAAUGAAACAGGAACCC?

A 3

B 6

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 Smooth endoplasmic reticulum

C Rough endoplasmic reticulum

D Mitochondrion

Question #27

Which organelle is responsible for the making of ribosomes?

A Golgi apparatus

B Nucleolus

C Rough endoplasmic reticulum

D Lysosome

Question #28

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

A Red

B Green

C Yellow

D Blue

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 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 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 krebs cycle, glycolysis, electron transport

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 noncompetitive inhibition; competitive inhibition

C exergonic reaction; endergonic reaction

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 5

B 1

C 4

D 3

E 7

F 6

Question #38

Entropy is

A disorder

B order

C simplicity

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 FALSE

B TRUE

Question #41

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

A TRUE

B FALSE

Question #42

The body uses ____________ to maintain a constant pH.

A Buffers

B Carbon dioxide

C Water

D Lipids

Question #43

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

A Nuclear envelope

B Cell membrane

C Phospholipid molecule

D Mitochondrion

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 13

B 14

C 9

D 5

Question #46

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

A Telophase

B Anaphase

C Prophase

D Metaphase

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 Mitochondria

B Rough endoplasmic reticula

C Central water vacuoles

D Cell membranes

Question #49

Which of the following is the smallest unit of life?

A The organism

B The cell

C The organic molecule (like DNA)

D The organelle

Question #50

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

A ATP

B Acetyl-CoA

C NADH

D Glucose

Question #51

Which organelle is specifically associated with photosynthesis?

A Mitochondria

B Centrosomes

C Chloroplasts

D Ribosomes

Question #52

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

A Gycolysis

B Calvin Cycle

C Electron Transport Chain

D Krebs 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 Lactic acid

B Both Lactic acid and ATP

C ATP

D Sugar

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 assemble amino acids into a polypeptide chain.

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

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 Golgi apparatus

B Mitochondrion

C Lysosome

D Rough Endoplasmic Reticulum (ER)

Question #58

Cell cytoplasm is primarily composed of ___________.

A water

B carbohydrate

C protein

D lipid

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 hypotonic environment

C a platonic 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 lack double bonded carbon atoms in their fatty acids

B They are associated with animal fat

C All these answers are associated with saturated fats

D They have a higher melting point

Question #62

Which of the following is an example of an element?

A Carbon

B Glucose

C Salt

D Water

Question #63

An atom with a positive charge has

A more electrons than protons

B more protons than electrons

C more neutrons than protons

D equal numbers of protons, electrons, and neutrons

Question #64

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

A Ionic bonds

B Covalent bonds

C James Bonds

D Hydrogen bonds

Question #65

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

A Ecosystem and biosphere

B Organism and population

C Atom and Cell

D Tissue and organ

Question #66

Which of the following is properly characterized as a producer?

A A mushroom

B An oak tree

C Both a mushroom and an oak tree

D An eagle

Question #67

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

A Homeostasis

B Energy Utilization

C Multicellularity

D Order

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