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Biology & Geology

Chapter 1 - Support and Movement in Living Organisms

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Chapter 2 - Hormonal Coordination in Living Organisms

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Chapter 3 - Reproduction in Living Organisms

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Chapter 4 - Immunity in Living Organisms

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Chapter 5 - Molecular Biology - DNA Structure and Function

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Chapter 6 - Molecular Biology - RNA, Protein Synthesis and Genetic Engineering

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Chapter 7 - Geology, Earth Sciences and Ecology

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Quiz

Lesson 2 Quiz: DNA Structure, Replication and DNA Repair Enzymes

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  • Questions count: 11
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1.
Which enzyme is responsible for linking Okazaki fragments into a continuous strand during lagging strand replication?
DNA Ligase
Reverse Transcriptase
DNA Polymerase
DNA Helicase
2.
A person who skillfully makes beautiful objects by hand is called a/an ________.
pilot
scientist
engineer
artisan
3.
If a particle moves along a straight line such that its position s(t) = t3 - 6 t2 + 9 t meters, the particle comes to an instantaneous rest (velocity v(t) = 0) at times:
t = 1 second and t = 3 seconds
t = 6 seconds
t = 0 seconds only
t = 2 seconds and t = 4 seconds
4.
The movement of hydrotropism in plant roots is considered tropism:
randomly
Positive (the root bends in the direction of moisture and water concentration)
Negatively
Unaffected
5.
Antidiuretic hormone (ADH/vasopressin) works to raise blood pressure by:
Sodium excretion in urine
Stimulate sweat
Smooth blood vessel constriction and water reabsorption in nephrons
Expansion of the arteries
6.
The fetal membrane that directly surrounds the fetus and secretes a fluid that protects it from shock and dehydration and facilitates its movement is:
Vitelline membrane
Amnion
Amniotic membrane (Chorion)
Plasma membrane
7.
The enzyme responsible for separating the two strands of DNA from each other by breaking hydrogen bonds during replication is:
Ligase
DNA polymerase
Helicase enzyme
Palace enzyme
8.
DNA polymerase always adds new nucleotides in a specific direction:
From party 3' to 5' only
From party 5' To party 3' For new growing bar only
randomly
In both directions together
9.
Okazaki Fragments formed on the die strip (5' to 3') During DNA replication they are joined by an enzyme:
Helix enzyme
Polymerase enzyme
Tac polymerase enzyme
DNA ligase
10.
Modifying enzymes produced by bacteria work to:
Cracking viruses
Sugar analysis
Adding methyl groups (-CH3) to the nucleotides of recognition sites in bacterial DNA to protect it from their shortening enzymes.
Cell wall construction
11.
Sticky Ends resulting from the action of shortening enzymes are characterized by:
Inactive phosphate sequences
Collagen thickened ends
Ends surrounded by peptide bonds
Short, extended single strands of unpaired nucleotides capable of spontaneous association with complementary ends
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