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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 3 Quiz: Mechanism of the Immune System (Lines of Defense & Humoral/Cellular Immunity)

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  • Questions count: 16
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1.
Why is the genetic code described as 'degenerate' or 'redundant'?
One codon can code for multiple different amino acids.
The genetic code decays as the cell ages.
Multiple different codons can code for the same single amino acid.
The genetic code differs completely between bacteria and humans.
2.
In a titration experiment, 20.0 mL of 0.15 M H2SO4 is completely neutralized by 30.0 mL of NaOH solution. The molar concentration of the NaOH solution is:
0.30 M
0.10 M
0.20 M
0.05 M
3.
The indicator that exhibits a yellow color in acidic medium, blue in alkaline medium, and green in neutral medium is:
Methyl orange
Litmus solution
Bromothymol blue
Phenolphthalein
4.
We visited the pottery village in Fustat ________ our holiday in Cairo.
during
as
when
while
5.
Watch out! The ladder is shaking violently. You ________ fall!
have
will
are going to
were
6.
The common ratio r of the geometric sequence (64, 32, 16, 8, ...) is:
r = 1/2
r = 4
r = -1/2
r = 2
7.
The derivative of f(x) = 4 x3 - 5 x2 + 7 x - 9 with respect to x is:
f'(x) = 12 x3 - 10 x2 + 7
f'(x) = 4 x2 - 5 x + 7
f'(x) = 12 x2 - 10 x
f'(x) = 12 x2 - 10 x + 7
8.
Using the Quotient Rule, the derivative of y = (x + 3) / (x - 2) for x != 2 is:
-5 / (x - 2)2
5 / (x - 2)2
1 / (x - 2)2
(2x + 1) / (x - 2)2
9.
The derivative of y = sin(3x) with respect to x is:
3 sin(3x)
3 cos(3x)
-3 cos(3x)
cos(3x)
10.
A diver descends to a depth of 30 meters in seawater (density = 1030 kg/m3). If atmospheric pressure is 1.013 x 105 Pa and g = 9.8 m/s2, the total absolute pressure experienced by the diver is approximately:
4.04 x 105 Pa (approx. 4.0 atmospheres)
6.06 x 105 Pa
1.01 x 105 Pa
3.03 x 105 Pa
11.
A solution with a pH value of 3.0 is classified as:
Weakly basic
Neutral
Strongly acidic
Strongly alkaline
12.
Peyer's spots's Patches) Tiny lymph nodes spread in the mucous membrane lining the:
Stomach
Pharynx
esophagus
Lower part of the small intestine (ileum)
13.
Identical (monozygotic) twins arise genetically as a result of:
Fertilization of two eggs by two different sperm
Artificial parthenogenesis
Fertilization of one egg by two 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.
14.
The decomposition of the corpus luteum in the ovary of a non-pregnant woman at the end of the menstrual cycle results in:
Placenta formation
Secretion of huge amounts of LH
Continued growth of the uterine lining
A sharp drop in the concentration of the hormone progesterone leads to the breakdown of the uterine lining, the rupture of its capillaries, and the occurrence of menstruation
15.
The number of polar bodies resulting from the maturation and fertilization of 3 primary oocytes in the ovary of a human female is equal to:
9 Polar bodies (assuming division of the first polar body)
12 A polar body
6 Polar bodies
3 Polar bodies
16.
The two sites on the subunit of the ribosomal subunit where the two tRNA molecules stabilize during polypeptide chain elongation are:
Coiling site and binding site
Peptidyl site (P) and aminoacyl site (A)
Location 5' And site 3'
The location of the palace and the location of the IUD
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