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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 4 Quiz: Menstrual Cycle, Fertilization, Embryonic Development and Contraception

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1.
What is the structural characteristic of a restriction endonuclease recognition site?
It is a palindromic sequence reading identical 5' to 3' on both strands.
It always begins with the start codon AUG.
It consists of 15-20 repetitive nucleotides.
It contains only adenine and thymine bases.
2.
The common ratio r of the geometric sequence (64, 32, 16, 8, ...) is:
r = 2
r = 1/2
r = 4
r = -1/2
3.
The slope of the tangent line to the curve y = x2 - 6 x + 5 at the point (4, -3) equals:
m = 8
m = -2
m = 2
m = -3
4.
The equation of the tangent line to the curve y = x3 at the point (1, 1) is:
y = 3x - 2
y = -3x + 4
y = x
y = 3x + 1
5.
If the tangent to y = x2 - 4x + 5 is parallel to the x-axis, the point of tangency is:
(2, 1)
(2, 0)
(0, 5)
(4, 5)
6.
Identical (monozygotic) twins arise genetically as a result of:
Fertilization of one egg by two sperm
Fertilization of two eggs by two different sperm
Fertilization of one egg by one sperm, then the resulting cell mass is divided into two parts that are identical in genetic makeup and sex.
Artificial parthenogenesis
7.
Hydra and planaria share the ability to reproduce asexually by:
Regeneration
Bacteria formation
Longitudinal binary fission
Budding only
8.
Common and economically beneficial chromosome duplication in the plant kingdom (such as strawberries, wheat, and apples) leads to:
Larger cells and tissues and larger, sweeter and more productive fruits
Plant sterility and death
Loss of chlorophyll
Root loss
9.
The percentage of DNA encoding the construction of proteins and enzymes in the genetic content of eukaryotic cells (such as humans) represents approximately:
More than 90%
100%
50%
Less than 2% Of the total cell genome
10.
The number of codons that code for the 20 amino acids in the genetic table is equal to:
61 Codons (out of a total of 64 codons after excluding the three stop codons)
20 Codona
64 Codona
32 Codona
11.
The genetic code is characterized as universal because:
It is found in the nucleus only
It does not change with mutations
It consists of only two letters
The same codons code for the same amino acids in all organisms from bacteria to humans, confirming the common origin of life
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