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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: The Human Reproductive System and Gametogenesis

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  • Questions count: 20
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1.
Cells that carry CD8 receptors and directly eliminate cancer cells, virus-infected cells, and transplanted organs are:
Cytotoxic T cells
Helper T cells (Th)
Memory B cells
Mast cells
2.
In the human female, the second (delayed/conditional) meiotic division of the secondary oocyte takes place in:
The fallopian tube when the sperm enters the head for fertilization to occur
Ovaries before ovulation
Graaf's vesicle
Uterine cavity
3.
Okazaki Fragments formed on the die strip (5' to 3') During DNA replication they are joined by an enzyme:
Tac polymerase enzyme
DNA ligase
Helix enzyme
Polymerase enzyme
4.
The hydrostatic pressure exerted by a static homogeneous liquid of density rho at depth h beneath its free surface is expressed by:
P = 1/2 rho * g * h2
P = rho * g / h
P = rho * g * h
P = rho * h / g
5.
A metallic cube of side length 10 cm and density 7800 kg/m3 is completely submerged in water (density 1000 kg/m3). The buoyant force (upthrust) acting on the cube is (g = 10 m/s2):
10 N
100 N
68 N
78 N
6.
The first human protein produced commercially using recombinant DNA technology to treat diabetics is:
Human hormone insulin (Insulin)
Growth hormone
Interferon protein
Hemoglobin
7.
The protein secreted by cytotoxic T cells (Tc) that creates holes in the plasma membrane of the target cell is:
Interleukin
globulin
Complement C3
Perforin protein
8.
Connecting two complementary DNA strands by hydrogen bonds makes them:
connected by peptide bonds
criss-crossing each lap
Two exactly identical bars in the same direction
Two parallel strands in opposite directions that are chemically complementary
9.
If (x - 1, x + 2, 3x) form a geometric sequence, the positive value of x is:
6
3
4
2
10.
Combined contraceptive pills are considered an effective method because they:
The fallopian tubes close mechanically
It kills sperm
It contains synthetic hormones similar to estrogen and progesterone that inhibit the secretion of FSH and LH from the pituitary, thus preventing the maturation of eggs and the occurrence of ovulation.
Placental abruption
11.
The two hormones that are secreted from the mucous membrane of the small intestine to stimulate the pancreas to secrete its digestive juices are:
Secretin and cholecystokinin (Secretin & CCK)
Thyroxine and calcitonin
Insulin and glucagon
Prolactin and oxytocin
12.
A chemical substance used in the laboratory to cause mutations and chromosome duplication in the growing tips of plants is:
Colchicine, mustard gas, or nitrous acid
Hyaluronic acid
Sucrose solution
Glycerin
13.
We visited the pottery village in Fustat ________ our holiday in Cairo.
when
as
while
during
14.
When severe dehydration and decreased blood volume and body fluids occur, which of the following hormonal changes occur?
Thyroxine secretion stops
Calcitonin secretion increases
ADH decreases and insulin increases
The secretion of ADH and aldosterone increases to restore water and salts
15.
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 = 0 seconds only
t = 6 seconds
t = 1 second and t = 3 seconds
t = 2 seconds and t = 4 seconds
16.
The slope of the tangent to the curve y = (x + 1)/(x - 1) at x = 2 is:
2
3
-1
-2
17.
Telomeres are found at the ends of eukaryotic chromosomes and perform an important function in:
Synthesis of enzymes
Construction of ribosomes
Centromere doubling
Protecting chromosomes from corrosion and merging with each other and maintaining their structure
18.
In a hydraulic press, the ratio of the cross-sectional area of the large piston to that of the small piston is 50. If a force of 100 N is exerted on the small piston, the maximum force exerted by the large piston is:
2 N
2500 N
50,000 N
5000 N
19.
The density of an ideal gas at temperature T and pressure P is rho. If the pressure is tripled and the absolute temperature is halved, the new density becomes:
6 rho (since rho is proportional to P / T)
3 rho
1.5 rho
0.67 rho
20.
The major histocompatibility complex (MHC) protein associates within the macrophage cell with:
Microbe antigen after being broken down by lysosomal enzymes to be displayed on the external surface
Histamine molecules
Perforin protein
Secreted antibodies
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