PCAT BIOLOGY 1

Question 1

The presence of which bacteria is an indiction of human or animal wastes in water supply?

Answer 1

E.coli

Question 2

The Kreb’s cycle is a a characteristic of?

Answer 2

cellular respiration

Question 3

What part of cellular respiration take place at the inner mitochondrial membrane?

Answer 3

electron transport chain

Question 4

A drug designed to enhance the ability of the body to get rid of cancer cells or virus-infected cells would most likely be enhancing the function of

Answer 4

Cytotoxic T cells(NK)

Question 5

What blood vessel has the highest pressure?

Answer 5

Arteries

Question 6

The predominant site of B-lymphocyte production in most mammals is

Answer 6

Bone marrow

Question 7

This class of hormones is produced in both the adrenal cortex and gonad?

Answer 7

Steroidal

Question 8

Stability in an allele is caused by

Answer 8

Selection pressure which eliminates extremes of traits

Question 9

Many of the blood pressure medications currently in use lower blood pressure by ?

Answer 9

Dilating blood vessels

Question 10

In parasitism, the interaction between two organisms?

Answer 10

One organism benefits the other

Question 11

What is filtered by the Kidney?

Answer 11

uric acid, creatinine, urea

Question 12

The Eustachian canal functions to

Answer 12

equalize air pressure( between middle ear and pharynx)

Question 13

The function of dendrites( web-like structures) at the end of a neuron is

Answer 13

to increase surface area

Question 14

The site of glycogenesis

Answer 14

the liver

Question 15

Natural but active immunity is acquired when ________

Answer 15

a person has and recovers from a disease

Question 16

Antibodies transferred from mother to child is an example of ________

Answer 16

naturally acquired passive immunity

Question 17

A person receiving antibodies from a horse is an example of __________

Answer 17

artificially acquired passive immunity

Question 18

a person being injected with an antigen is an example of_________-

Answer 18

artificially acquired natural immunity

Question 19

During embryogenesis, mesoderm gives rise to

Answer 19

muscles and reproductive organs

Question 20

The first phase of mitosis is __________

Answer 20

prophase

Question 21

Failure of chromosomes to separate during cell division leads to__________

Answer 21

polyploidy

Question 22

The function of semicircular canals is _________

Answer 22

balance

Question 23

Unequal concentrations of an ion inside or outside of a cell are maintained by _________

Answer 23

active transport

Question 24

_______ is the release of a substance for use by the organism producing it

Answer 24

secreation

Question 25

____________are the most immunologic class of molecules`

Answer 25

proteins

Question 26

What are the most numerous blood vessels in the body?

Answer 26

Capillaries

Question 27

________ do not have a nucleus

Answer 27

bacteria

Question 28

The function of red bone marrow is _________

Answer 28

synthesis of red blood cells

Question 29

insertions and deletions are both examples of ________

Answer 29

mutations

Question 30

__________ is a small piece of DNA found in bacteria cells

Answer 30

plasmids

Question 31

The study of fungi is called ___________

Answer 31

mycology

Question 32

A structure produced by some bacteria is very resistant to heat and chemicals is the

Answer 32

spore

Question 33

_______ are obligate intracellular parasittes

Answer 33

viruses

Question 34

______________ control the growth of bone

Answer 34

pitutiary glad

Question 35

_____________ is used for the production of thyroxine

Answer 35

iodine

Question 36

Steroid hormones are produced by_______________

Answer 36

reproductive glands and adrenal glands

Question 37

Maintaining NA/K balance in the body is the function of the __________

Answer 37

kidney

Question 38

The disease botulism blocks the release of ach. The effect of this would be___________

Answer 38

loss of signal transmission from nerve to muscle

Question 39

A virus carries genetic information from one bacteria to another in the process of _________

Answer 39

transduction

Question 40

The disease Reyes Syndrome is linked with the use oF _______

Answer 40

ASPIRIN

Question 41

The binding of ubiquitin usually triggers _________

Answer 41

proteosomal degradation of protein

Question 42

In bacteria, the electron transport chain takes place in_________

Answer 42

the cell membrane

Question 43

The outer layers of the skin are composed of________

Answer 43

striated squamous epithelium

Question 44

In the _______ cycle 2 three carbon molecules are broken down into six CO2 molecules

Answer 44

Citric acid cycle

Question 45

Appendicular skeleton

Answer 45

arms and legs

Question 46

The highest blood pressure would be present in the_______

Answer 46

aorta

Question 47

The term cleavage refers to________

Answer 47

an early phase of embryonic development

Question 48

In the united states, 1 in 250 people suffer from hemochromatosis, a common hereditary disease. The disease results in an accumulation of iron in the body. What is a common form of treatment?

Answer 48

Blood letting

Question 49

_______ is a trihybrid cross

Answer 49

1/16

Question 50

______ is found in prokaryotes and not eukaryotes

Answer 50

Pilli

Question 51

In individuals who have the genotype XXX this occurs as a result of _______

Answer 51

nondisjunction

Question 52

Certain bacteria take atomospheric nitrogen( N2) and turn it into ammonium( NH3), a process know as

Answer 52

nitrogen fixation

Question 53

During the menstrual cycle, production of luteinizing hormone later leads to the production of progesterone. If fertilization does not occur, the rising levels of progesterone will inhibit further production of lutienizing hormone. This is an example of_________

Answer 53

negative feedback

Question 54

Edward Jenner developed the idea of _______

Answer 54

vacinnes

Question 55

Allergies are caused by

Answer 55

an overreaction to harmless materials

Question 56

Mitosis results in_________

Answer 56

two cells with the same number of chromosomes as the parent cells

Question 57

___________ are responsible for the synthesis of protein?

Answer 57

ribsomes

Question 58

A mushroom is __________

Answer 58

a reproductive structure