Author Question: Which of the following statements regarding Down syndrome is INCORRECT? A. The affected fetus can ... (Read 17 times)

casperchen82

  • Hero Member
  • *****
  • Posts: 540
Which of the following statements regarding Down syndrome is INCORRECT?
 
  A. The affected fetus can be detected before birth by means of amniocentesis.
  B. The affected child is mentally retarded and usually has a characteristic physical appearance.
  C. Cells from an affected child reveal an extra sex chromatin body (Barr body) attached to the nuclear membrane of the cells.
  D. Chromosome karyotype of affected child usually reveals trisomy of chromosome 21.

Question 2

The mechanism by which penicillin, cephalosporins, and other beta-lactarn ring antibiotics act against bacteria is
 
  A. They prevent the synthesis of the bacterial cell wall by inactivating the bacterial enzymes that make the cell wall.
  B. They disrupt the function of the bacterial cell membrane.
  C. They attach to ribosomes of the bacterial cell so that the bacterium cannot make needed proteins.
  D. They compete with compounds that the bacterium needs in order to grow and divide, thereby inhibiting or stopping the growth of the bacteria.



smrerig

  • Sr. Member
  • ****
  • Posts: 325
Answer to Question 1

C

Answer to Question 2

A



Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
 

Did you know?

The average adult has about 21 square feet of skin.

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Did you know?

To maintain good kidney function, you should drink at least 3 quarts of water daily. Water dilutes urine and helps prevent concentrations of salts and minerals that can lead to kidney stone formation. Chronic dehydration is a major contributor to the development of kidney stones.

Did you know?

The horizontal fraction bar was introduced by the Arabs.

Did you know?

Lower drug doses for elderly patients should be used first, with titrations of the dose as tolerated to prevent unwanted drug-related pharmacodynamic effects.

For a complete list of videos, visit our video library