severe combined immunodeficiency disease.

Question 35

The first successful treatment of a human genetic disorder through gene therapy was with a disorder known as:

Answer

severe combined immunodeficiency disease.

diabetes mellitus.

human dwarfism.

acquired immune deficiency syndrome.

Question 36

Which of the following best explains how water moves freely across a plasma membrane?

Answer

Because of the charges on phospholipids, water moves directly through the phosopholipid bilayer.

Water is brought into the cell by endocytosis and released by exocytosis.

Because water is so important to a cell, it is actively transported across the membrane.

Water moves through protein-lined channels in the plasma membrane.

The passage of water across a plasma membrane requires facilitated transport.

Question 37

Muscle cells store energy in the form of ________ until it is used for the production of ATP.

Answer

glucose

starch

glycogen

fat

sucrose

Question 38

The more buffers present in a body fluid, the less stable the pH will be.

Answer

True

False

Question 39

Which of the following is not true of influenza viruses?

Answer

All strains of influenza virus are highly pathogenic.

The influenza virus genome contains RNA rather than DNA.

Nutritional factors affect the ability of the influenza virus to cause infection.

The relationship between virus and host depends partially on haemaglutinin present on the viral surface.

Question 40

Which of the following diseases is caused by a virus?

Answer

rabies

Lyme disease

syphilis

toxic shock syndrome

tuberculosis

Question 41

Why do some physicians advise patients with a bladder infection to drink a lot of cranberry juice?

Answer

Cranberry juice contains chemicals that kill viruses and bacteria.

The increased volume of fluid in the bladder causes bacterial cells to burst as they absorb the excess fluid.

Cranberry juice makes the urine more acidic, decreasing the rate at which microorganisms can grow and reproduce.

Cranberry juice increases the efficiency of urine production by the kidneys.

all of the above

Question 42

Pharmaceutical companies prefer to genetically engineer large animals with human genes because it may be possible to obtain large amounts of the resulting protein from the animals’:

Answer

Question 43

Not only does science involve gaining knowledge about the natural world, it also involves the process of obtaining that knowledge.

Answer

True

False

Question 44

Translocation occurs when a piece of chromosome breaks off and is lost.

Answer

True

False

Question 45

Which of the following best describes an angiogram?

Answer

an x-ray picture of blood vessels

a recording of heart sounds

use of a balloon to widen an artery

a sensation of pain in the chest associated with poor blood circulation to the heart

a recording of the electrical activity of the heart

Question 46

Which of the following body fluids is not known to transmit HIV from human to human?

Answer

blood

semen

saliva

vaginal fluid

breast milk

Question 47

An increased risk for cardiovascular health problems is associated with:

Answer

an elevated level of hemoglobin.

high blood levels of HDLs.

decreased production of albumins.

high blood levels of LDLs.

low blood levels of LDLs.

Question 48

The process by which the blastocyst becomes buried within the endometrial lining of the uterus is:

Answer

differentiation

embryonic development.

Question 49

Which of the following is true regarding lung cancer?

Answer

Symptoms include chest pain, chronic cough, and wheezing.

Lung cancer may be treated with surgery, chemotherapy, and/or radiation.

This type of cancer typically takes many years to develop.

Problems associated with lung cancer include inadequate exchange of gases in the alveoli and impairment of blood flow in the pulmonary blood vessels.

all of the above

Question 50

State-level data on seasonal influenza are general, qualitative reports from state and territorial epidemiologists, summarizing weekly influenza activity, rather than specific numbers of infections.

Answer

True

False

 

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