Mallery Biology 150 Exam 4 Latest Update -

Mallery Biology 150 Exam 4 Latest Update - h 110 Questions and Verified Correct Answers Golden Ticket to Guaranteed A+ Verified by Professor

(Hershey-Chase experiment, labeled genetic molecules in bacteriophages) What molecules were labeled with 32P?

• proteins
• DNA
• ribose sugars
• kinase enzymes

e. none of these - CORRECT ANSWER: B

(T2 DNA entered the host cell)

(Hershey-Chase experiment, labeled genetic molecules in bacteriophages) What molecules were labeled with 32S?

• proteins
• DNA
• ribose sugars
• glucose

e. none of these - CORRECT ANSWER: A

(Protein remained outside the host cells) 1 / 3

(Hershey-Chase experiment, labeled genetic molecules in bacteriophages) Which labeled molecule entered the bacterial cells establishing it as the genetic material of cells?

• 32P
• 32S
• both of the radioactive labeled molecules entered the bacteria - CORRECT

ANSWER: A

(32P tagged DNA core)

A compound contains hydroxyl groups as its only predominant functional chemical group. Which of the following statements is likely to be true concerning this compound?

• It is an acid and will be negatively charged at pH 3
• It would likely dissolve in water
• It is hydrophobic
• It would form covalent bonds with water

e. none of these - CORRECT ANSWER: B

A part of the promoter, called the TATA box, is said to be highly conserved in evolution.Which of the following might this illustrate?

• Any mutation in the sequence is selected against
• The sequence evolves very rapidly
• The sequence does not mutate
• The sequence is found in many but not all promoters

e. The sequence is transcribed at the start of every gene - CORRECT ANSWER: A

• / 3

A research laboratory uses a cancer cell line that has undergone thousands of cell cycle divisions in the laboratory without any change in the length of its chromosomes. The

cancer cell line is therefore likely to express:

• high levels of RNA polymerase
• DNA polymerases with high fidelity
• high levels of telomerase

d. high levels of ligase activity - CORRECT ANSWER: C

A single nucleotide substitution mutation that results in a different amino acid being substituted for the native amino acid is known as?

• redundant mutation
• missense mutation
• nonsense mutation
• single frame shift mutation

e. none of these - CORRECT ANSWER: B

(Redundant = aa sequence the same, Missense = different aa, Nonsense = stop codon, single frame shift = hot spot mutation)

A specific DNA segment is known to code for 3 different, but closely related proteins.This is likely due to?

• premature mRNA degradation
• alternative RNA splicing
• the use of different enhancers
• protein degradation

e. differential gene activity - CORRECT ANSWER: B

• / 3