HESI Online Practice Questions and Answers

How many ounces are in a ton?

A. 1,600

B. 2,000

C. 16,000

D. 32,000

Which of the following is correct?

A. 4/8 = 8/17

B. 5/12 = 15/24

C. 3/4 = 9/12

D. 2/3 = 7/10

In the context of the passage, "accommodate" means to

A. arrange lodging for

B. contain

C. make allowances for

D. excuse

Reading Material

(1)

The study, published today in Nature Microbiology, holds promise for a new treatment method against antibiotic-resistant bacteria (commonly known as superbugs). (2) The star-shaped structures are short chains of proteins called `peptide polymers', and were created by a team from the Melbourne School of Engineering.

(3)

The team included Professor Greg Qiao and PhD candidate Shu Lam, from the Department of Chemical and Biomolecular Engineering, as well as Associate Professor Neil O'Brien-Simpson and Professor Eric Reynolds from the Faculty of Medicine, Dentistry and Health Sciences and Bio21 Institute.

(4)

Professor Qiao said that currently the only treatment for infections caused by bacteria is antibiotics. (5) However, over time bacteria mutate to protect themselves against antibiotics, making treatment no longer effective. (6) These mutated bacteria are known as `superbugs'.

(7)

"It is estimated that the rise of superbugs will cause up to ten million deaths a year by 2050. (8) In addition, there have only been one or two new antibiotics developed in the last 30 years," he said.

(9)

Professor Qiao and his team have been working with peptide polymers in the past few years. (10) Recently, the team created a star-shaped peptide polymer that was extremely effective at killing Gram-negative bacteria - a major class of bacteria known to be highly prone to antibiotic resistance - while being non-toxic to the body.

(11)

In fact, tests undertaken on red blood cells showed that the star-shaped polymer dosage rate would need to be increased by a factor of greater than 100 to become toxic.

(12)

The star-shaped peptide polymer is also effective in killing superbugs when tested in animal models. (13) Furthermore, superbugs showed no signs of resistance against these peptide polymers.

(14)

The team discovered that their star-shaped peptide polymers can kill bacteria with multiple pathways, unlike most antibiotics which kill with a single pathway.

(15)

They believe that this accounts for the superior performance of the star-shaped peptide polymers over antibiotics. (16) One of these pathways includes `ripping apart' the bacteria cell wall.

(17)

While more research is needed, Professor Qiao and his team believe that their discovery is the beginning of unlocking a new treatment for antibiotic-resistant pathogens.

The term superbug refers to ____.

A. mutated bacteria that are larger in size than non-mutated bacteria

B. bacteria that help the body fight off infection

C. mutated bacteria that have developed a resistance to antibiotics

D. bacteria from insect bites that only affect humans

A scientist discovers an atom of sodium in its natural state. The scientist knows that the oxidation number of this atom is most likely:

A. 0.

B. 1.

C. 2.

D. 3.

What is the most abundant element in the universe?

A. nitrogen

B. oxygen

C. hydrogen

D. helium

Viscosity increases when ____.

A. temperature decreases

B. none of these; viscosity is constant

C. carbon is introduced

D. temperature increases

Which of the following is responsible for differentiation, or specialization, of cells?

A. Platelets.

B. Hormones.

C. Neurons.

D. Brain cells.

The ____ is the layer of the heart used for contraction that has striated muscle fibers.

A. decacardium

B. pericardium

C. myocardium

D. endocardium

Which of these is the best definition of the word chide?

A. scold

B. whisper

C. pick

D. yell

Select the word or phrase that makes this sentence grammatically correct.

The child ____ to ride all the roller coasters at Disneyland.

A. wants

B. want

C. does want

D. has the want

Which of the following sentences has correct subject-verb agreement?

A. The ambulance, which had flashing red lights on top, were letting other vehicles on the road know to pull over.

B. Either kale or spinach is a healthy vegetable to eat with dinner.

C. One of the soccer players kick the ball farther than his other teammates.

D. Several of the pieces of art was sold for above-average prices.

What is the correct way to write the missing words in this sentence?

Cara chose to study Jupiter, Saturn, ____ for her science project.

A. Neptune, and The Sun

B. neptune, and the sun

C. Neptune, and the Sun

D. Neptune, and the sun

What characteristic of water allows for hydrogen bonding between molecules?

A. Its high specific heat.

B. Its cohesive properties.

C. Its covalent bonds.

D. Its polar nature.

Which scientists are responsible for describing the structure of DNA?

A. Watson and Crick.

B. Watson and Holmes.

C. Holmes and Croiger.

D. Brown and Curie.