Comp Test 2

The sequence of subunits in the DNA "backbone" is Question 1 options: A)  base phosphate base phosphate base phosphate. B)  sugar base sugar base sugar base sugar base. C)  phosphate sugar phosphate sugar phosphate sugar. D)  base phosphate sugar base phosphate sugar. E)  base sugar phosphate base sugar phosphate. Question 2 (1 point) Saved Listen Which cell structure is NOT part of translation? Question 2 options: A)  Enhancer B)  Codon C)  mRNA D)  tRNA E)  Ribosome Question 3 (1 point) Saved Listen Which of the following statements regarding DNA is false ?

Question 3 options: A)  DNA uses the nitrogenous base uracil. B)  DNA is a nucleic acid. C)  DNA molecules have a sugar-phosphate backbone. D)  One DNA molecule can include four different nucleotides in its structure. E)  DNA uses the sugar deoxyribose. Question 4 (1 point) Saved Listen If a codon has the sequence CAG, what tRNA anticodon will bind to it? Question 4 options: A)  GUC B)  CAG C)  UGA D)  GTC E)  CTG Question 5 (1 point) Saved Listen What is the function of DNA polymerase?

A)  begins when two DNA molecules join together to exchange segments. B)  produces two daughter DNA molecules that are complementary to each other. C)  results in the formation of four new DNA strands. D)  uses each strand of a DNA molecule as a template for the creation of a new strand. E)  occurs through the addition of nucleotides to the end of the DNA molecule. Question 8 (1 point) Saved Listen What parts of a chromosome specify the amino acid sequence of a protein? Question 8 options: A)  The sequence of bases B)  The types of bonds C)  The sequence of phosphates D)  The sequence of sugars Question 9 (1 point) Saved Listen If one strand of DNA is CGGTAC, the corresponding strand would be Question 9 options: A)  CGGTAC.

B)  GCCTAG. C)  GCCAUC. D)  GCCATG. E)  TAACGT. Question 10 (1 point) Saved Listen A base pair is a unit of DNA that consists of Question 10 options: A)  one nucleotide. B)  two identical chromosomes. C)  a single chromosome. D)  two complementary nucleotides, one on each strand of a DNA molecule. E)  one sugar bonded to one phosphate. Question 11 (1 point) Saved Listen Sex-linked genes are found on either the X chromosome or the Y chromosome but not both. Question 11 options:

Question 15 options: True False Question 16 (1 point) Saved Listen Which of the following decreases the probable variation between individuals? Question 16 options: a)  genetic linkage b)  crossing-over c)  independent assortment of chromosomes d)  random fertilization of gametes Question 17 (1 point) Saved Listen If a genetic disorder is caused by a dominant allele, individuals with which of the following genotypes would be affected by the disorder? Question 17 options: a)  AA  and  aa b)  aa  and  Aa c)  AA  and  Aa d)  AA ,  Aa , and  aa

Question 18 (1 point) Saved Listen The ________ gene is responsible for activating many genes involved in "maleness" during embryonic development. Question 18 options: All genes on the same chromosome are linked. TRUE Question 20 (1 point) Saved Listen Down syndrome results from trisomy of chromosome 21. Which of the following is NOT an example of how this may have happened? Question 20 options: a)  inversion of a portion of chromosome 21 during S phase b)  translocation of chromosome 21 c)  failure of the homologous pair for chromosome 21 to separate in meiosis I d)  failure of the sister chromatids in a duplicated chromosome 21 to separate in meiosis II How many different types of amino acids are found in proteins? Question 1 options: A)  4 B)  Thousands C)  20

D)  mRNA E)  tRNA Question 4 (1 point) Saved Listen How many different types of bases are used to encode all the genetic information in DNA? Question 4 options: A)  2 B)  4 C)  10 D)  20 E)  5 Question 5 (1 point) Saved Listen If a DNA segment has the sequence GCTAA, what RNA sequence will be made from it? Question 5 options: A)  CGATT B)  GCTAA C)  UGATT