Question 1

What is the spontaneous process by which the base-pairing occurs between two strands of DNA?

Accepted Answer

A)  differentiation
B)  duplication
C)  hybridization
D)  polymerization
E)  replication

Question 2

In order to visualize the DNA for a karyotype _____.

Accepted Answer

A)  DNA is treated with enzymes to open the compacted chromatin structure
B)  DNA is treated with proteases to open the compacted chromatin structure
C)  DNA is stained to visualize the DNA.
D)  DNA is treated with enzymes to compact the chromatin structure
E)  DNA is treated with proteases to compact the chromatin structure

Question 3

Which pair represents the correct complementary bonding of nitrogen containing bases in a DNA molecule?

Accepted Answer

A)  adenine and cytosine
B)  adenine and guanine
C)  cytosine and thymine
D)  guanine and cytosine
E)  guanine and thymine

Question 4

Why did most scientists assume that the bases of DNA should be on the outside of the helix?

Accepted Answer

A)  the bases were easily digested by DNA cutting enzymes
B)  the hydrogen bonding between sugar and phosphate would form a helix as well
C)  the bases needed to be accessible for replication
D)  a single-stranded DNA molecule would not be able to support the bases on the interior
E)  the bases were hydrophobic

Question 5

Using the diagram, indicate the molecule that functions at each step in DNA replication 
-DNA polymerase

Accepted Answer

A)  1
B)  2
C)  3
D)  4

Question 6

If an error is made during replication that is not caught by DNA polymerase,the most likely is that _____.

Accepted Answer

A)  both strands of DNA will be mutated
B)  only the daughter strand will be mutated
C)  a mutation that causes cancer will occur
D)  DNA ligase will repair the mistake before a mutation occurs
E)  DNA replication will stall indefinitely

Question 7

In animal cells,____ is/are usually a one-way path.

Accepted Answer

A)  replication
B)  translation
C)  transcription
D)  differentiation
E)  replication and translation

Question 8

What is the effect of ionizing radiation on DNA?

Accepted Answer

A)  faster replication
B)  the formation of nucleotide dimers
C)  kinks in the DNA molecule
D)  breaks in the DNA molecule
E)  base pair mismatching

Question 9

How many times does DNA wrap around a histone?

Accepted Answer

A)  1
B)  2
C)  4
D)  6
E)  10

Question 10

Body cells of human males contain _____.

Accepted Answer

A)  one X chromosome
B)  two X chromosomes
C)  one Y chromosomes
D)  two Y chromosomes
E)  one X and one Y chromosome

Question 11

A somatic cell is defined as a(n) _____.

Accepted Answer

A)  blastocyst
B)  egg
C)  body cell
D)  cloned cell
E)  sperm  cell

Question 12

In the technique of embryo splitting,_____.

Accepted Answer

A)  two embryos are fused
B)  an embryo is split apart to form two identical individuals
C)  two sperm are used to fertilize a single egg
D)  two eggs and two sperm are used to form two embryos
E)  an embryo's nucleus is removed and replaced with an adult embryo

Question 13

Answer the following questions by matching each term with the most appropriate description.
-location of highly constricted DNA only present when cells are dividing

Accepted Answer

A)  Autosome
B)  Centromere
C)  Chromosome
D)  Chromosome number
E)  DiploidF) Sex chromosomesG) Sister chromatids

Question 14

How does x-ray crystallography provide details about molecular structure?

Accepted Answer

A)  Only DNA molecules scatter x-rays; therefore, this helped to prove that DNA was the genetic material in cells.
B)  X-rays are reflected by some atoms and absorbed by others; thereby giving clues to molecule structure.
C)  X-rays are scattered by atoms in a specific pattern, from which molecular size, shape, and spacing of repeating elements can be calculated.
D)  This technique captures photographs of magnified molecules.
E)  X-rays can be used to isolate DNA molecules from living organisms.

Question 15

Butterflies Butterflies are diploid organisms.In these animals,the sex of an individual is determined by Z and W chromosomes.Use this information to answer the following question.Which chromosomes are carried by a normal female butterfly?

Accepted Answer

A)  ZO
B)  ZW
C)  WW
D)  WO
E)  ZWW

Question 16

The majority of DNA in a cell that has undergone differentiation is _____.

Accepted Answer

A)  transcribed
B)  translated 
C)  turned off
D)  mutated 
E)  hydrolyzed

Question 17

During SCNT,the DNA is extracted from the egg using a(n) _____.

Accepted Answer

A)  fine point needle
B)  virus
C)  micropipette 
D)  electric current
E)  calcium phosphate

Question 18

Which base(s) pairs with cytosine?

Accepted Answer

A)  adenosine
B)  cytosine
C)  thymine
D)  guanine
E)  cytosine and thymine

Question 19

The image of an individual's complement of chromosomes arranged by size,length,shape,and centromere location is called a(n) _____.

Accepted Answer

A)  autotype
B)  genotype
C)  phenotype
D)  karyotype
E)  double helix

Question 20

Order the steps of somatic cell nuclear transfer.
-Step 3

Accepted Answer

A)  A skin cell harvested from a donor animal is injected into a region between the cytoplasm and the plasma membrane.
B)  Electric current causes foreign cell to fuse with and empty its nucleus into the cytoplasm of the egg.
C)  DNA from egg is suctioned out using a micropipette
D)  Embryo forms

Exam 6: DNA Structure And Function

Which base(s) pairs with cytosine?

Correct AnswerverifiedShow Answer

In the technique of embryo splitting,_____.

Correct AnswerverifiedShow Answer

In animal cells,____ is/are usually a one-way path.

Correct AnswerverifiedShow Answer

In order to visualize the DNA for a karyotype _____.

Correct AnswerverifiedShow Answer

If an error is made during replication that is not caught by DNA polymerase,the most likely is that _____.

Correct AnswerverifiedShow Answer

How does x-ray crystallography provide details about molecular structure?

Correct AnswerverifiedShow Answer

Butterflies Butterflies are diploid organisms.In these animals,the sex of an individual is determined by Z and W chromosomes.Use this information to answer the following question.Which chromosomes are carried by a normal female butterfly?

Correct AnswerverifiedShow Answer

What is the effect of ionizing radiation on DNA?

Correct AnswerverifiedShow Answer

The majority of DNA in a cell that has undergone differentiation is _____.

Correct AnswerverifiedShow Answer

Why did most scientists assume that the bases of DNA should be on the outside of the helix?

Correct AnswerverifiedShow Answer

Answer the following questions by matching each term with the most appropriate description. -location of highly constricted DNA only present when cells are dividing

Correct AnswerverifiedShow Answer

A somatic cell is defined as a(n) _____.

Correct AnswerverifiedShow Answer

Order the steps of somatic cell nuclear transfer. -Step 3

Correct AnswerverifiedShow Answer

Which pair represents the correct complementary bonding of nitrogen containing bases in a DNA molecule?

Correct AnswerverifiedShow Answer

The image of an individual's complement of chromosomes arranged by size,length,shape,and centromere location is called a(n) _____.

Correct AnswerverifiedShow Answer

What is the spontaneous process by which the base-pairing occurs between two strands of DNA?

Correct AnswerverifiedShow Answer

Body cells of human males contain _____.

Correct AnswerverifiedShow Answer

During SCNT,the DNA is extracted from the egg using a(n) _____.

Correct AnswerverifiedShow Answer

How many times does DNA wrap around a histone?

Correct AnswerverifiedShow Answer

Using the diagram, indicate the molecule that functions at each step in DNA replication -DNA polymerase

Correct AnswerverifiedShow Answer

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