Teas Sceince Practice Test 1

Question 1

The function of this prokaryotic organelle is to house the genes that code for the proteins needed by the cell

Answer 1

Nucleiod

Question 2

Which of the following structures normally appears in pairs in the human female reproductive system

Answer 2

Oviduct

Question 3

Conducting cells in the heart are found in the ?

Answer 3

Purkinje fibers

Question 4

What is the compact outer layer of bone called

Answer 4

Cortical

Question 5

Phytoplankton is added to a water fill tank, and a bright light is shined into one end of the tank. The phytoplankton migrate to the left side of the tank. Small fish are headed to the tank, and they to migrate to the left side of the tank. Researchers hypothesize that the fish migrate to the left side to feed on the phytoplankton but are not actually attracted to the light itself. What control should the researchers use to confirm their hypothesis

Answer 5

A tank with no phytoplankton but with fish that is lit on one end

Question 6

Which of the following actions is an example of an observation

Answer 6

Measuring the amount of rain in a month on a city

Question 7

Which of the following organic molecules produces only water vapor (H2O) and carbon dioxide (CO2) when completely burned in the presence of oxygen (O2)

Answer 7

C2 H5 OH

Question 8

Mendels law of independent assortment states that

Answer 8

Alleles for two or more genes are independently sorted into gametes

Question 9

Chemical messengers that can pass directly through the cell membrane without first binding to a receptor are part of which class of macromolecules

Answer 9

Lipids

Question 10

An individual with a dominant phenotype but unknown genotype for a single trait of interest is mated to a recessive individual. The offspring are observed to determine the genotype of the dominant parent for that trait. This controlled meeting is called a

Answer 10

Test cross

Question 11

In which of the following structures does the mechanical digestion of food begin

Answer 11

Mouth

Question 12

Which of the following glands are part of the endocrine system

Answer 12

Adrenal

Question 13

How does urine proceed through the excretory system ?

Answer 13

Kidneys
Ureters
Urinary bladder
Urethra

Question 14

Which of the following structures helps to package a double stranded length of DNA into a tightly compacted metaphase chromosome

Answer 14

Histone

Question 15

In a reflex arc, which one of the following structures is bypassed when a motor response is stimulated

Answer 15

Brain

Question 16

Which of the following represents the proper flow sequence of air through the respiratory system after it passes through the nose or mouth to the main bronchi

Answer 16

Pharynx
Larynx
Trachea

Question 17

Which of the following strategies is the immune response systems first line of defense against pathogens

Answer 17

Barriers against pathogens

Question 18

Unlike arteries, veins utilize which features to prevent the back flow of blood

Answer 18

Valves

Question 19

An acid catalyzed dehydration of a secondary alcohol

Answer 19

Yields the most substituted Alkene in the absence of peroxides

Question 20

Which of the following is considered an accessory organ of the digestive system

Answer 20

Liver

Question 21

Which of the following terms describes the attachment site that moves when a muscle contracts

Answer 21

Insertion

Question 22

The testes are located in an external pouch for which of the following reasons

Answer 22

Sperm can only develop properly at temperatures slightly lower than normal body temperatures

Question 23

Which of the following structures typically expels it’s secretions directly onto the surface of the skin

Answer 23

Eccrine sweat gland

Question 24

When enough energy is added to a liquid to overcome the attractive forces between its molecules, the liquid undergoes

Answer 24

Vaporization

Question 25

Which of the following would best represent the process of respiration in the carbon cycle

Answer 25

A human exhaling carbon dioxide

Question 26

Unlike fully quadrupedal animals, the ventral surface of a bipedal human is on which side of the body

Answer 26

Anterior

Question 27

Why are penicillin and it’s deratives ineffective against pneumonia caused by bacteria in the genus mycoplasma

Answer 27

Mycoplasma do not have a cell wall

Question 28

An atom with 11 protons, 12 neutrons, and 10 electrons is

Answer 28

A positively charged ion

Question 29

When neurotransmitters leave the axon terminal, to what location are they first released

Answer 29

Synaptic cleft

Question 30

Which of the following is most likely to be a source of error when using a spectrophotometer

Answer 30

Touching the flat Sides of a sample holder

Question 31

How do cytotoxic T cells differ from helper T cells

Answer 31

Cytotoxic T cells directly destroy infected or abnormal cells, while helper T cells do not

Question 32

If a heterozygous blood type A female is crossed with a heterozygous blood type B male, what is the probability of producing a child with type AB blood ?

Answer 32

25 %

Question 33

HCL + NaOH

Answer 33

Water

Question 34

Which of the following organelles in eukaryotic cells is responsible for the production of ATP

Answer 34

Mitochondria

Question 35

Alexander Fleming famously discovered penicillin by accident when mold spores contaminated one of the petri dishes in which he was growing bacterial colonies. How did he inferred that the mold was secreting the substance that could kill bacteria

Answer 35

Only bacteria immediately surrounding the mold colony had died

Question 36

Almost all of the weight of a carbon atom comes from which of these particles

Answer 36

Protons in neutrons