Chapter 42 test

Which comparisons between traditional breeding and genetic engineering is correct?

• A

• B

• C

• D

Which of the following is/are the characteristic(s) of monoclonal antibodies?

(1) They are produced by clones of a single parent B cell.

(2) They are antigen-specific.

(3) They can be easily isolated from the blood of an immunized person.

• (1) only

• (1) and (2) only

• (2) and (3) only

• (1), (2) and (3)

Microorganisms can be genetically modified to synthesize antigens of pathogens. These antigens can be used

• to test for pregnancy.

• to diagnose cancers.

• to treat infectious diseases.

• in vaccines to induce immunity against infectious diseases.

Which is not a characteristic of stem cells?

• They are unspecialized cells.

• Some types have limited developmental potential.

• They undergo limited cycles of meiotic cell division.

• They can differentiate into different types of cells.

Stem cells could be used for the production of

• anti-cancer drugs.

• monoclonal antibodies.

• organs for transplant.

• vaccines.

Which of the following statements about somatic cell gene therapy is/are correct?

(1) All genetic diseases can be treated by somatic cell gene therapy.

(2) The offspring of the patient receiving somatic cell gene therapy will not have the genetic disease.

(3) It involves transgenic technique.

• (1) only

• (3) only

• (2) and (3) only

• (1), (2) and (3)

Which diseases is the least likely to be treated by gene therapy?

• influenza

• cystic fibrosis

• cancer

• severe combined immunodeficiency disease

Which of the following is/are the limitation(s) or potential hazard(s) of gene therapy?

(1) The introduced genes may not be integrated into desired positions on the human chromosomes.

(2) Genetic diseases caused by multiple gene defects are too complicated to be treated with current technologies.

(3) Genetic modification of human characteristics arouses ethical concerns.

• (1) only

• (1) and (2) only

• (2) and (3) only

• (1), (2) and (3)

Which of the following is/are the reason(s) for growing GM crops?

(1) to increase crop yields in order to support the world population

(2) to produce transgenic crops that can be used as vaccines to induce immunity against pathogens

(3) to induce antibiotic resistance in wild plants

• (1) only

• (1) and (2) only

• (2) and (3) only

• (1), (2) and (3)

Which of the following statements about Bt crops are correct?

(1) They produce Bt toxins to kill the larvae of pests.

(2) The Bt toxins produced do not kill adult pests.

(3) They may promote the emergence of Bt-resistant insects.

• (1) and (2) only

• (1) and (3) only

• (2) and (3) only

• (1), (2) and (3)