Biology Exam 3 Practice Exam

Front 1

the most common protein on the planet is

Back 1

rubisco

Front 2

a local regulator molecule diffuses through extracellular fluid to a cell in a NEARBY tissue, binding to an appropriate receptor

this is an example of

Back 2

paracrine signaling

Front 3

photosynthesis by green plants would use what color of light most efficiently?

Back 3

blue

Front 4

the photosynthetic pigments at the REACTION CENTER of both photosystems I and II of green plants are

Back 4

chlorophyll a

Front 5

pineapple plant and other CAM plants have adapted to semiarid climates by

Back 5

fixing carbon at night

Front 6

what are commonly used in intracellular signaling pathways by cells?

Back 6

adenylyl cyclase

G proteins

calmodulin

Front 7

in a C3 plant mesophyll cell, the enzyme rubisco is found where?

Back 7

in the chloroplast stroma

Front 8

the electron transport chain used to make ATP in photosynthesis is found where?

Back 8

in the mitochondrial matrix

Front 9

the electrons received by photosystem I in green plants are ultimately transferred to

Back 9

NADP+

Front 10

an egg is fertilized by a sperm to produce a single cell called a

Back 10

zygote

Front 11

Mendel's Second Law of Heredity, the Law of Independent Assortment, states

Back 11

that ALTERNATIVE ALLELES of character are passed on INDEPENDENTLY of one another and remain DISTINCT when passed on to the next generation

Front 12

an example of the genetic phenomenon known as continuous variation would be

Back 12

height in humans

Front 13

if Mendel had crossed a plant with red flowers with a plant that produced white flowers and had obtained pink flowers, assuming he wasn't color blind, he would have discovered

Back 13

incomplete dominance

Front 14

the close association of homologous chromosomes during prophase I of meiosis is called

Back 14

synapsis

Front 15

a diploid stem cell that divides many times to produce many new cells that all eventually differentiate into skeletal muscle would be an example of a

Back 15

somatic cell

Front 16

during mitosis, the proper order of the phases is

Back 16

prophase

prometaphase

metaphase

anaphase

telophase

Front 17

chiasmata form during

Back 17

prophase I

Front 18

with respect to meiosis, centromeres split during

Back 18

anaphase II

Front 19

A purple flower pea plant is said to be Pp. Pp is this plant's

Back 19

genotype

Front 20

A plant has a dominant phenotype but an unknown genotype. The proper experiment to determine its correct genotype would be a

Back 20

test cross

Front 21

Mendel's Law of Segregation is best demonstrated using

Back 21

a monohybrid cross

Front 22

A human cell in anaphase II of meiosis would have a total of ___ chromatids

Back 22

46

Front 23

A homozygous dominant plant (PP) is crossed with a homozygous recessive plant (pp). The F1 generation is then self-crossed to produce the F2 generation. The phenotypic or Mendelian ratio of the offspring will be

Back 23

3:1

Front 24

Alternative versions of a gene (genetic variations) are termed

Back 24

alleles

Front 25

The chromosomes condense during what phase of meiosis I?

Back 25

prophase I

Front 26

The ultimate product of a cell undergoing the process we call meiosis is a

Back 26

gamete

Front 27

An allele at one locus affects several phenotypic traits (e.g. cystic fibrosis is caused by a single defective gene which causes clogged blood vessels, sticky mucus, salty sweat, liver failure, etc.). This is an example of

Back 27

pleitropic effects

Front 28

The Calvin cycle in a C4 tropical grass plant occurs in the

Back 28

bundle sheath cells

Front 29

A protein is activated by phosphorylation as part of a signaling cascade. In order for this protein to be converted back to an inactive state it will likely require the action of

Back 29

a protein phosphatase

Front 30

Cycle AMP (cAMP) is an example of

Back 30

a second messenger

Front 31

During which phase of meiosis are the tetrads of homologous chromosomes aligned at the center of the dividing cell?

Back 31

metaphase I

Front 32

During which phase of meiosis do the centromeres uncouple and sister chromatids migrate to opposite poles of the cell?

Back 32

cytokinesis

Front 33

Between the metaphases of meiosis I and meiosis II

Back 33

there is no DNA synthesis

Front 34

Cyclin-dependent kinases function

Back 34

as check point regulators for progression through the cell cycle

Front 35

Mendel crossed two true breeding plants, one with purple flowers and one with white flowers. The progeny were all purple. In a Mendelian style experiment, these purple progeny represent the

Back 35

F1 generation

Front 36

What is the Mendelian or phenotypic ratio for the F2 generation from a typical DIHYBRID cross?

Back 36

1:2:1

Front 37

At what point during cell division/replication does genetic recombination occur?

Back 37

Prophase I of meiosis

Front 38

During mitosis, the formation of a cleavage furrow and the actual separation of the cytoplasm of the two daughter cells is called

Back 38

cytokinesis

Front 39

A Pp flowering pea plant produces purple flowers ("P" is dominant over "p" and "P" encodes purple flowers). Purple flowers would be considered the plant's

Back 39

phenotype

Front 40

A convenient way to visualize the possible genotypes of the offspring (and the expected ratio of each genotype/phenotype) from a genetic cross is to use

Back 40

a Punnett square

Front 41

At what point during the cell cycle does DNA replication occur?

Back 41

S phase

Front 42

During development of many multicellular organisms, some cells seem to die off in a preprogrammed fashion. This phenomenon is called

Back 42

apoptosis

Front 43

the electron that passes through photosystem I in a green plan was initially derived from

Back 43

water

Front 44

steroid hormones are somewhat unusual in that their receptors are

Back 44

intracellular and commonly found in the cytoplasm

Front 45

Mendel's revolutionary change in performing genetics experiments was to

Back 45

use peas

Front 46

Which of the following would be an example of a testcross as performed by Mendel?

Back 46

PP x pp