TEAS 7 science

In which of the following areas does protein breakdown begin in the human body?

a) mouth

b) stomach

c) small intestine

d) large intestine

a) mouth

Which of the following cell types is responsible for the production of soluble antibodies?

a) cytotoxic T cells

b) macropage cell

c) helper t cells

d) B cells

d) B cells

Which of the following organ systems is responsible for transporting nutrients, wastes, and other substances through out the human body?

a) respiratory

b) immune

c) nervous

d) circulatory

d) circulatory

Which of the following is characteristic of the human organism?

a) autotrophic with a genome stored in DNA

b) heterotrophic with a genome stored in DNA

c) autotrophic with a genome stored in RNA

d) heterotrophic with a genome stored in RNA

b) heterotrophic with a genome stored in DNA

Which of the following is the function of the lymph nodes in mammals?

a) pump oxygen into tissues spaces

b) store extra glucose for emergencies

c) synthesize hemoglobin for erthrocytes

d) filter debris from intracellular spaces

d) filter debris from intracellular spaces

The bands in the muscle sarcomere are formed by actin and which of the following other proteins?

a) myosin

b) dynein

c) keratin

d) myofibril

a) myosin

Which of the following structures within a human cell is responsible for recycling the material no longer functional or needed within the cell?

a) ribosome

b) lysosome

c) mitochondrion

d) nucleolus

b) lysosome

Which of the following is the correct structure and function of the cell membrane?

a) a double glycoprotein structure with embedded lipid bodies provides shape and rigidity to the cytoplasm

b) A double layer of phosphate proteins with lipid channels allows molecules to pass from the inside to the outside of cells

c) nonpolar phosphate heads and polar lips tails form a bilayer to control the transport of proteins

d) a phospholipid bilayer with embedded proteins regulates molecules entering and leaving cytoplasm

d) a phospholipid bilayer with embedded proteins regulates molecules entering and leaving cytoplasm

Which of the following chemical compounds prevents the lungs from collapsing?

a) mucus

b) surfactant

c) enzymes

d) buffers

b) surfactant

Which of the following structures diverts food into the esophagus and prevents it from entering the lungs?

a) uvula

b) soft palate

c) tonsils

d) epiglottis

d) epiglottis

Which of the following terms related to the respiratory system refers to the voice box for sound production?

a) pharynx

b) trachea

c) larynx

d) uvula

c) larynx

Unlike skeletal muscle, cardiac muscle is highly resistant to lactate-mediated fatigue because cardiac muscle

a) uses aerobic respiration in mitochondria for energy

b) operates with electrical energy supplied by the sinoatrial (SA) node

c) primarily metabolizes glucose using the fermentation pathway

d) does not need oxygen for the production of energy

a) uses aerobic respiration in mitochondria for energy

Which of the following arteries directly supplies oxygenated blood to the reproductive system?

a) common carotid artery

b) gonadal artery

c) femoral artery

D) subclavian artery

b) gonadal artery

Which of the following options represents the chromosomal composition of a normal zygote?

a) 23

b) 46

c) 69

d) 92

b) 46

Which of the following cell types provides a waterproofing function for the outer layers of skin?

a) melanocytes

b) keratinocytes

c) merkel cells

d) langerhans cells

b) keratinocytes

Which of the following produces progesterone to prepare the uterus for pregnancy?

a) endometrium

b) cervix

c) corpus luteum

d) Fallopian tubes

c) corpus luteum

Subcutaneous fat can be found in which of the following layers of the skin in the human body?

a) epidermis

b) dermis

c) hypedermis

d) dermal papillae

c) hypodermis

Which of the following glands primarily supplies hair shafts and skin with oily secretionS?

a) eccrine

b) apocrine

c) sebaceous

d) ceruminous

c) sebaceous

Which of the following glands is the primary producer of insulin?

a) thyroid

b) adrenal

c) pituitary

d) pancreas

d) pancreas

Type 1 diabetes is a disease associated with which of the following hormones?

a) estrogen

b) insulin

c) testosterone

d) thyroxine

b) insulin

Which of the following connects the kidneys to the bladder?

a) capillaries

b) ureters

c) urethra

d) arteries

b) ureters

Which of the following organs is the site of blood filtration?

a) kidneys

b) heart

c) lungs

d) brain

a) kidneys

Kidneys remove which of the following from the blood?

a) platelets

b) salts

c) oxygen

d) fat

b) salts

In which of the following parts of the body do T cells mature?

a) bone marrow

b) thymus

c) adrenal glands

d) thyroid

b) thymus

Which of the following is classified as a flat bone?

a) tarsal

b) vertebrae

c) rib

d) humerus

c) rib

Which of the following connects two bones together?

a) ligament

b) tendon

c) marrow

d) muscle

a) ligament

Which of the following are sesamoid bones?

a) phalanges

b) patellae

c) scapulae

d) metatarsals

b) patellae

The shape of villi and microvilli facilitates which of the following?

a) pushing food along the intestine via the ciliary motion of villi

b) creating barriers to food movement to increase digestion time

c) decreasing surface area for absorption

d) increasing surface area for absorption

d) increasing surface area for absorption

A person is suddenly frightened. Which of the following reactions occurs next?

a) liver cells absorb glucose from the bloodstream

b) blood vessels supplying skeletal muscles constrict

c) blood vessels supplying intestines dilate

d) Liver cells release glucose into the blood stream

d) Liver cells release glucose into the blood stream

Which of the following is an example of positive feedback?

a) oxytocin causes an increase in uterine muscle contractions, ultimately causing the posterior pituitary to release more oxytocin

b) an increase in blood glucose levels causes the release of insulin which results in the lowering of glucose levels in the blood and halting the release of insulin

c) a drop in the body temp causes the hypothalamus to activate warming mechanisms, which results in the increase of body temp

d) an increase in blood osmolarity causes the release of adh which causes urine to become more concentrated and osmolarity to decrease

a) oxytocin causes an increase in uterine muscle contractions, ultimately causing the posterior pituitary to release more oxytocin

Demyelinization results in which of the following?

A. Inhibited detection of a stimulus at the dendrites of a nerve cell

B. Disrupted propagation of an action potential along the axon of a nerve cell

C. Inhibited uptake of neurotransmitters at the synapse of a nerve cell

D. Disrupted ability of the Na+/K+ pumps to depolarize a cell

B. Disrupted propagation of an action potential along the axon of a nerve cell

The nephridium in worms has a function most similar to which of the following organs in humans?

a) liver

b) spleen

c) lymph nodes

d) kidneys

d) kidneys

Ca+ H2SO4

a) calcium sulfate

b) Hydrogen Sulfide

c) Calcium Sulfide

d) Hydrogen Sulfate

a) calcium sulfate

Which of the following classes of biomolecules can influence the rate of specific chemical reactions within the living cell?

a) nucleic acids

B) proteins

c) lipids

d) carbohydrates

B) proteins

Which of the following terms describes a sample composed of particles condensed into a small space and having vibrational but not translational motion?

a) solid

b) liquid

c) gas

d) plasm

a) solid

An atom has 3 protons, 4 neutrons and 3 electrons. Which of the following is the atoms mass number?

a) 3

b) 6

c) 7

d) 10

c) 7

Which of the substances will dissovle in water?

a) CH4

b) CCl4

c) CH3OH

d) C8H18

c) CH3OH

Purple eyes (F) are dominant over pink eyes (f). Which of the following will produce only offspring with pink eyes?

a) Ff x ff

b) Ff x Ff

c) FFx ff

d) ff x ff

d) ff x ff

A pregnant person who is a chain smoker has been diagnosed with lung cancer. Their biggest concern is if they have passed on the lung cancer to their child. Which of the following statements is correct regarding this situation?

a) children do not use their lungs until they are born so the cancer cannot pass to the child before birth

b) the cancer could pass from birth parent to fetus through blood, but anticancer medications can prevent the child fro developing cancer

c) if the pregnant parent undergoes treatment for lung cancer, both ther and the child can be cured

d) the cancer will not be transmitted to the child

d) the cancer will not be transmitted to the child

In mendelian inheritance, the dominant allele is for tall plants and the recessive allele is for short plants. Which of the following statements is true?

a) Tt is a phenotype that gives 50% short and 50% tall genotype

b) TT and Tt are both genotypes for the homozygous recessive phenotype

c) TT is the dominant phenotype, and the tall plant is the resulting genotype

d) TT and Tt are both genotypes for the tall plant phenotype

d) TT and Tt are both genotypes for the tall plant phenotype

Two researchers note that when weeds a and b grow next to each other the roots of weed a stop growing when they enter the root zone of weed b.

Because activated charcoal is known to absorb organic compounds, the researchers apply activate charcoal to the soil around the weed b. they not the roots of weed a then grow into the zone of weed b.

Which if the following hypotheses is being tested by?

a) weed a absorbs activated charcoal, which enhances root growth for weed a

b) weed b grows best in soil that contains few organic compounds

c) weed a is attracted to soil that contains activated charcoal

d) weed b produces an organic compound that inhibits root growth for weed a

d) weed b produces an organic compound that inhibits root growth for weed a

In a well-controlled experiment, researchers shows that a common topical antibiotic called chloramphenicol halts deadly fungal growth on the skin of amphibians. Which of the following is the best inference for how the antibiotic works to limit a fungal disease?

a) the antibiotic causes a mutation in the skin tissue that makes It resistant to the fungus

b) the antibiotic acts as a physical barrier that interferes with fungal growth

c) the antibiotic kills a bacterial partner that is essential for fungal infection

d) the antibiotic activates white blood cells production

c) the antibiotic kills a bacterial partner that is essential for fungal infection

A defining characteristic of a scientific hypothesis is that it is

a) testable

b) unexpected

c) correct

d) predictable

a) testable

The use of an electron microscope would most benefit the study of

a) the structure of atoms

b) the structure of cellular organelles

c) the structure of skeletal joints

d) chemical bonds in molecules

b) the structure of cellular organelles

Which of the following observations refutes the hypothesis that characteristics acquired during the parent's lifetimes are inherited by offspring?

a) changes in the neck in giraffe populations are due to genetic mutations

b) finches that live on different sources of food become unable to mate with one another after many generation

c) peppered moths turn from gray to white or black dependn=ing on the color of the tree bark on which they live

d) primates that have been taught sign language pass that ability to their offspring

a) changes in the neck in giraffe populations are due to genetic mutations

In a population that is growing, which of the following must be true?

a) immigrants + births = deaths + emigrates

b) emigrates + deaths > immigrants + births

c) immigrants + births > deaths + emigrates

d) emigrates + deaths = immigrants + births

c) immigrants + births > deaths + emigrates

Which of the following is a colligative property?

a) temp

b) surface tension

c) viscosity

d) osmotic pressure

d) osmotic pressure

Which of the following is not a form of active transport?

a) sodium-potassium pump

b) endocytosis

c) exocytosis

d) osmosis

d) osmosis

Which of the following is a lysosomal storage disease?

a) Tay-Sachs

b) Pfeiffer syndrome

c) Myasthenia gravis

d) Wernicke encephalopathy

a) Tay-Sachs

Which of the following is not a pyrimidine base?

a) cytisine

b) adenine

c) thymine

d) uracil

b) adenine

Which of the following is the start codon of a mRNA sequence?

a) AUG

b) AAU

c) UCG

d) UAA

a) AUG

What is the probability of an offspring having a homozygous recessive trait is both parents are heterozygous for that trait?

a) 100

b) 75

c) 50

d) 25

d) 25

Which blood type is dominant?

a) A

b) B

c) O

d) they are all co-dominant

d) they are all co-dominant

How many components comprise the cycle of infection?

a) 3

b) 4

c) 5

d)6

c) 5

Which of the following is gram-negative bacterium?

a) corynebacterium diphtheriae

b) haemophilus influenzae

c) listeria monocytogenes

d) staphylococcus aureus

b) haemophilus influenzae

Which of the following describes the function of the ribosome?

a) protein synthesis

b) energy production

c) cell movement

d) storage of molecules

a) protein synthesis

Because muscle cells require large amounts of energy to function correctly, which organelles would be abundant in those types of cells?

a) ribosomes

b) mitochondria

c) cystoskeleton

d) cell membrane

b) mitochondria

Which of the following organelles house the genetic material?

a) nucleus

b) ribosomes

c) cell membrane

d) lysosomes

a) nucleus

Which of the following nucleotides pairs with adenine in DNA?

a) guanine

b) adenine

c) cytosine

d) thymine

d) thymine

Which of the following is the number of chromosomes found in a human cell?

a) 1 circular chromosomes

b) 22 (11 pairs)

c) 46 (23 pairs)

d) 50 (25 pairs)

c) 46 (23 pairs)

Which of the following statements about nucleotides and genes is correct?

a) a gene contains thousands of chromosomes

b) a nucleotide contains many genes and chromosomes

c) nucleotides form strings of DNA that make up genes

d) Nucleotides form strings of chromosomes that make up DNA

c) nucleotides form strings of DNA that make up genes

Which of the following is the name for a segment of DNA that codes for a protein?

a) nucleotide

b) gene

c) chromosomes

d) DNA

b) gene

A pea plant has a dominant homozygous genotype. Which of the following letters best represents this genotype?

a) WW

b) Ww

c) ww

d) WX

a) WW

Which of the following best describes the expression of alleles?

a) heritable trait

b) genotypes

c) phenotype

d) p generation

c) phenotype

Which of the following best describes non-mendelian inheritance patterns?

a) they occur when there are factors other than dominant and recessive traits

b) each trait has one dominant and one recessive

c) heterozygous monohybrid crosses result in a 3:1 ratio of dominant to recessive phenotypes

d) traits are only inherited on the somatic chromosomes

a) they occur when there are factors other than dominant and recessive traits

Which of the following groups is synthesized from monosaccharides like glucose?

a) carb

b) lipids

c) protein

d) nucleic acid

a) carb

Which of the following macromolecules stores genetic info?

a) carbs

b) lipids

c) protein

d) deoxyribonucleic acid

d) deoxyribonucleic acid

Which of the following monomers form enzymes?

a) glucose and fructose

b) amino acids

c) nucleotides

d) fatty acids

b) amino acids

Which of the following foods contain mostly lipids?

a) potatoes

b) oil

c) chicken

d) lettuce

b) oil

What term is used to describe all disease-causing micro-organisms?

a) decompose

b) prokaryote

c) pathogen

d) eukaryote

c) pathogen

Which of the following is at the core of every virus particle?

a) DNA or RNA

b) enzymes

c) DNA and RNA

a) DNA or RNA

Which of the following achieves the greatest resolution and highest mag?

a) bright field

b) dark field

c) fluorensence

d) electron

d) electron

Which of the following are considered micro-organisms? (select all the apply)

a) mosquitos

b) protozoa

c) bacteria

d) fungi

b) protozoa

c) bacteria

d) fungi

Which element has the highest atomic radius?

a) strontium

b) uranium

c) francium

d) radium

c) francium

How do isotopes of an element differ?

a) they have different numbers of protons

b) they have different atomic numbers

c) they have different numbers of electrons

d) they have different numbers of neutrons

d) they have different numbers of neutrons