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Biology & Geology

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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Quiz

Lesson 1 Quiz: Support in Plants and the Human Skeletal System

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1.
An ionic bond is formed primarily between:
Two non-metal atoms sharing pairs of valence electrons equally
Noble gas atoms at very low temperatures
Positive metal ions immersed in a sea of delocalized electrons
A metal atom that loses electrons forming a cation and a non-metal atom that gains electrons forming an anion due to electrostatic attraction
2.
The second pair of floating ribs connects to the dorsal vertebra No.
Dorsal vertebra 11
Dorsal vertebra 10
Dorsal vertebra No. 12 (19th vertebra of the spine)
First lumbar vertebra
3.
Cross-links that extend from myosin filaments and act as hooks to pull actin are formed with the help of ions:
Iodine ions
Zinc ions
Iron ions Fe2+
Calcium ions Ca2+
4.
The hormone that is secreted from the corpus luteum and reaches its maximum concentration on days 21 to 23 of menstruation is:
Estrogen
Progesterone
LH hormone
FSH hormone
5.
Okazaki Fragments formed on the die strip (5' to 3') During DNA replication they are joined by an enzyme:
Polymerase enzyme
Tac polymerase enzyme
Helix enzyme
DNA ligase
6.
The Ancon breed mutation in sheep with short, arched legs is considered a mutation:
Harmful innovation
Fatal to fetuses
A useful mechanism that the breeder kept in mind to prevent sheep from jumping fences and damaging crops
Numerical chromosome
7.
Stop codons that bind to the release factor to terminate the translation process are:
CCC And GGG and TTT
UAA And UAG and UGA
AUG And GUG and UUG
AAA And UUU and GGG
8.
DNA hybridization depends on the ability of single strands from different sources to combine if:
Made in the same cell
Treatment with shortening enzyme
They are just the same height and weight
They contain complementary sequences of nitrogenous bases and are linked by hydrogen bonds
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