Answered: 1. In genetic engineering, a reverse…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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PLEASE HELP ME ANSWER THESE OBJECTIVES QUESTIONS. THANK YOU IN ADVANCE.

1. In genetic engineering, a reverse transcriptase enzyme is used to

a. replace the Pfu polymerase enzyme

b. denature all messenger RNAs

c. undo the action of a restriction enzyme

d. produce complementary DNA

2. In lac operon, both gene A and gene B undergo a transcription process. Gene B can only undergo transcription in the presence of lactose and in the absence of glucose. The product of gene A is often altered by an inducer. Which of the following is true about genes A and B?

a. Gene A= structural gene; Gene B= regulatory gene

b. Gene A= promoter gene; Gene B= operator gene

c. Gene A= lacZ gene; Gene B= promoter gene

d. Gene A= regulatory gene; Gene B= structural gene

3. In response to a newly encountered pathogen, the first antibody class to appear in the serum is ________.

a. IgE

b. IgM

c. IgA

d. IgG

4. Lymphocytes that involve in the defense system by means of direct attack other foreign cells and agents are:

a. B cell

b. T cells

c. Macrophages, Dendritic cells

d. Basophils, Eosinophil, Neutrophil

5. Match the biologists to their contributions.

a. Alfred Hershey and Martha Chase I. Supported semi-conservative model of DNA replication

b. Matthew Meselson and Franklin Stahl II. DNA molecule comprised of two strands, forming a double helix structure

c. Rosalind Franklin III. Introduced the one gene-one enzyme hypothesis

d. George Beadle & Edward Tatum IV. Confirmed that DNA is a genetic material

a. a (III), b (II), c (IV), and d (I)

b. a (III), b (I), c (II), and d (IV)

c. a (IV), b (I), c (II), and d (III)

d. a (IV), b (III), c (II), and d (I)

6. Observable phenotypic attribute of an organism is known as___

a. Allele

b. Trait

c. Factor

d. Character

7. Screening of bacteria containing recombinant plasmids can be done by

a. using deoxyribonuclease enzyme to denature all chromosomal DNA in the culture media

b. using 15N (heavy isotope) to locate the plasmids

c. producing antibodies specific for each bacterium containing a recombinant plasmid

d. using culture media containing antibiotic ampicillin

8. The correct composition (%) of nitrogenous bases in a DNA molecule of a human is

a. %(A) = %(T); %(G) = %(C)

b. % (A) greater than % (T) / % (G) less than % (C)

c. %(A) = %(G); %(T) = %(C)

d. %(A) = %(U) = %(G) = %(C)

9. The cross with phenotypic ratio of 9:3:3:1 indicates____

a. Monohybrid

b. Independent assortment

c. Incomplete dominance

d. Codominance

10. Which one of the following cells is both a phagocyte and an antigen-presenting cell.

a. NK cell

b. neutrophil

c. macrophage

d. eosinophil

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