Biology 101 Exam 2

Front 1

The gain of electrons by an atom or a molecule is referred to as

Back 1

Reduction

Front 2

Consider the following equation: FAD + 2H^+ +2e- ----> FADH2. Which statement is true of the equation?

Back 2

FAD is being reduced in the reaction, forming FADH2

Front 3

In an election transport chain, H+ ions are pumped across a membrane in order to allow for

Back 3

Chemiosmotic phosphorylation, the production of ATP, the H+ concentration gradient

Front 4

Which statement is not true of a chloroplast

Back 4

Chloroplast lack electron transport systems

Front 5

Which of the following is not an electron acceptor or electron carrier

Back 5

ATP

Front 6

Which of the following plays a role in chemiosmotic oxidative phosphorylation

Back 6

A source of electrons, a terminal electron acceptor, a hydrogen pump, ATP synthase all play a role

Front 7

What is an example of an enzymatic cycle

Back 7

Krebs cycle and the Calvin cycle of photosynthesis

Front 8

The overall reactants for photosynthesis are

Back 8

CO2 and H2O

Front 9

Which of the following is the most accurate transfer of energy during photosynthesis

Back 9

Light, excited electrons in pigments, C6 H12 O6

Front 10

Electrons lost by chlorophyll-a in photosystem 2 (at the beginning of photosynthesis) are replaced by electrons lost from

Back 10

Enzymatic breakup of water molecules

Front 11

Which of the following is the terminal electron acceptor at the end after (photosystem 1) of the light reaction of photosynthesis

Back 11

Nadp+

Front 12

What causes ATP synthase to make ATP from ADP and phosphate

Back 12

The diffusion of hydrogen ions through the ATP synthase molecule

Front 13

Which of the following diffuses into the leaves of a plant and is required for photosynthesis

Back 13

CO2

Front 14

Which of the following is not directly required for the Calvin cycle of photosynthesis

Back 14

O2

Front 15

In the Calvin cycle what molecule binds to fix carbon dioxide for eventual glucose production

Back 15

RuBP

Front 16

What happens to the nadph produced in the light reactions of photosynthesis

Back 16

It is used to reduce molecules in the Calvin cycle

Front 17

Which statement is not true of stomata

Back 17

When a plant is dehydrated the stomata will open

Front 18

Which statement is not true of C4 and cam plants

Back 18

They are found in what tropical habitats where water is abundant

Front 19

The overall reactants for the cellular oxidation of glucose are

Back 19

O2 and C6H12O6

Front 20

What is the overall purpose for the cellular oxidation of glucose

Back 20

Produce ATP

Front 21

Glycolysis does not produce

Back 21

CO2

Front 22

Which statement is true of fermentation

Back 22

During fermentation yeast produces ethanol and carbon dioxide

Front 23

What is the terminal electron acceptor of the mitochondrial electron transport system in the cellular oxidation of glucose

Back 23

O2

Front 24

Which process produces the most ATP in the cellular oxidation of glucose

Back 24

Mitochondrial chemiosmotic oxidative phosphorylation

Front 25

What is the importance of the Krebs cycle in the cellular oxidation of glucose

Back 25

It produces large quantities of nadh and fadh2 which are then used for mitochondrial chemiosmotic oxidative phosphorylation

Front 26

Which statement is not true of mitochondria

Back 26

Plant cells lack mitochondria

Front 27

The cellular oxidation of glucose yields a net gain of how many ATP per glucose if the cell has mitochondria and oxygen is plentiful

Back 27

36

Front 28

The cellular oxidation of glucose yields a net gain of how many ATP per glucose if the cell lacks mitochondria or if oxygen is not present

Back 28

Two

Front 29

Which of the following does not occur within the mitochondria

Back 29

Glycolysis

Front 30

How is water produced in the mitochondria

Back 30

Electrons and hydrogen form nadh and fadh2 are eventually picked up by the O2 and the electron transport system forming H2O

Front 31

Most of the producers in ecosystems are plants where do plants get the ATP they need to live

Back 31

From the cellular oxidation of glucose molecules they produce themselves in the process of photosynthesis

Front 32

Where do consumers in ecosystems get the ATP they need to live

Back 32

From the cellular oxidation of glucose molecule molecules obtain by feeding on other organisms

Front 33

Which of the following is not a product of the cellular oxidation of glucose

Back 33

Oxygen

Front 34

Which molecule contains all the genetic instructions of an organism

Back 34

DNA

Front 35

What is true of DNA

Back 35

DNA is a double helix, DNA is composed of monomers called nucleotides, there are four different types of nucleotides in DNA

Front 36

Consider the section of DNA listed below which statement is true

5'TACAGGGCCC3'

3'ATGTCCCGGG5'

Back 36

Only one of the two strands codes for a protein

Front 37

Nucleic acids DNA and RNA are composed of monomers called

Back 37

Nucleotides

Front 38

Which of the following is true of RNA

Back 38

RNA is found in the nucleus and in the cytoplasm

Front 39

Which statement is not true of the central dogma

Back 39

Both transcription and translation occur in the nucleus of the eukaryotic cells

Front 40

What type of RNA is composed of codons that code for the amino acid sequence of a protein

Back 40

M-RNA

Front 41

During the replication of DNA the enzyme _____ unwinds the double helix of DNA and the enzyme _____ builds a complementary strand along each original strand of DNA

Back 41

Helicase; DNA polymerise

Front 42

Telomeres are

Back 42

The ends of chromosomes

Front 43

What is complementary to the following section of single-stranded DNA

5'TGGC3'

Back 43

3'ACCG'5

Front 44

Which RNA has an anticodon that is complementary to a specific codon and is attached to a specific amino acid and works with other RNAs to physician amino acids for chemical bonding to one another

Back 44

T-RNA

Front 45

How many mRNA nucleotides in succession code for a single amino acid known as a codon

Back 45

Three

Front 46

When a piece of mRNA is translated what region of the MRNA terminates the process of translation

Back 46

Stop codon

Front 47

What is a difference between DNA and RNA

Back 47

DNA is typically longer than RNA, DNA contains the base thymine not uracil, DNA nucleotides contain a different sugar than the sugars in nucleotides DNA is double-stranded RNA single-stranded

Front 48

Which type of RNA has the information for the amino acid sequence of a protein being produced

Back 48

MRNA

Front 49

Translation occurs in the ____ and transcription occurs in the ____

Back 49

Cytoplasm; nucleus

Front 50

For transcription to begin RNA polymerase must bind to the

Back 50

MRNA

Front 51

Which statement is not true

Back 51

All cells can divide an infinite number of times

Front 52

Chromosomes replicate during which sub phase of interphase in the cell cycle

Back 52

The S subphase

Front 53

In mitosis anaphase immediately follows

Back 53

Metaphase

Front 54

Chromatids separate and are pulled to opposite ends of the cell during

Back 54

Anaphase

Front 55

The nuclear envelope disintegrates, the sister chromatids coil and condense becoming visible under the light microscope, and the mitotic spindle begins to form in which stage of mitosis

Back 55

Prophase

Front 56

Sister chromatids line up at the equator of the mitotic spindle in which phase of mitosis

Back 56

Metaphase

Front 57

When a parent cell undergoes mitosis it produces _____ daughter cells all being _____

Back 57

Two; genetically identical

Front 58

Homologous chromosomes are separated in

Back 58

Meiosis

Front 59

If a cell with a ploidy of 4n undergoes meiosis the daughter cells will have a ploidy of

Back 59

2N

Front 60

Which of the following is a function of mitosis

Back 60

Asexual reproduction, growth, and cell placement

Front 61

When a parent cell undergoes meiosis it produces _____ daughter cells all being _____

Back 61

Four; genetically different

Front 62

If a cell with a ploidy of 2n undergoes meiosis the gamites will have a ploidy of

Back 62

N

Front 63

Gametes sperm and ovum are produced by

Back 63

Meiosis

Front 64

Crossing over occurs in which phase of meiosis

Back 64

Prophase 1

Front 65

What statement is true of crossing over

Back 65

It causes sister chromatids of homologous chromosomes to be genetically dissimilar

Front 66

Which of the following does not contribute to the genetic diversity of a species

Back 66

Mitotic cell division

Front 67

The random alignment of homologous chromosomes during meiosis is called _____ and occurs during _____

Back 67

Independent assortment; metaphase 1

Front 68

A chromatid is best described as

Back 68

One of the two identical strands of DNA in a double-stranded chromosomes

Front 69

After mitotic cell division each daughter cell is _____ the size of the original parent cell and each new daughter cell grows to its mature size during _____ of the cell cycle

Back 69

50%; G1 Gap Phase 1

Front 70

A cell containing only one set of chromosomes is referred to as

Back 70

Haploid