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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.
I have already booked the flight tickets. I ________ to London next Friday.
will travel
am traveling
travel
traveled
2.
Sticky Ends resulting from the action of shortening enzymes are characterized by:
Ends surrounded by peptide bonds
Inactive phosphate sequences
Collagen thickened ends
Short, extended single strands of unpaired nucleotides capable of spontaneous association with complementary ends
3.
What is the direct physiological effect of injecting a healthy person with an excessive dose of the hormone insulin?
Uric acid accumulation
A sharp increase in blood sugar
A severe drop in blood glucose levels (hypoglycemia) and hypoglycemic coma
Increased urine secretion
4.
Which of the following conditions leads to increased secretion of parathormone from the parathyroid glands?
Low level of ionized calcium in blood plasma
Low phosphate
Excessive vitamin D excess
High blood calcium level
5.
Injection with serum (Antiserum) containing ready-made antibodies to neutralize scorpion venom gives the patient immunity:
Lasting positivity
Innate
Cellular induced
A rapid and temporary acquired negativity that is not accompanied by memory cells
6.
The indicator that exhibits a yellow color in acidic medium, blue in alkaline medium, and green in neutral medium is:
Phenolphthalein
Litmus solution
Bromothymol blue
Methyl orange
7.
Magnetic iron oxide (Magnetite, Fe3O4) is chemically considered a mixed oxide because reacting it with hot concentrated sulfuric acid yields:
A mixture of iron(II) sulfate, iron(III) sulfate, and water vapor
Elemental iron and sulfur dioxide
Iron(III) sulfate only
Iron(II) sulfate and hydrogen gas only
8.
Potters use high-temperature ovens called ________ to bake and harden clay vessels.
fridges
blenders
kilns
looms
9.
An aqueous solution of titanium(IV) chloride (TiCl4) is diamagnetic and colorless because:
The Ti4+ ion has an electronic configuration of [Ar] 3d0, devoid of unpaired d-electrons
It absorbs all visible wavelengths of light
Titanium is an alkali earth metal
Chlorine ions quench all magnetic dipoles
10.
In a hydraulic press, if the radius of the large piston is 4 times that of the small piston, the mechanical advantage is:
8
4
2
16
11.
The gland that secretes both external ductal secretion and non-ductal hormonal secretion directly into the blood is:
pituitary gland
Adrenal gland
Pancreas (common/mixed gland)
Thyroid gland
12.
Stop codons that bind to the release factor to terminate the translation process are:
AAA And UUU and GGG
CCC And GGG and TTT
UAA And UAG and UGA
AUG And GUG and UUG
13.
The main chemical reducing agent inside the Midrex furnace and its industrial source are respectively:
Hydrogen gas produced from the electrolysis of water
Carbon dioxide mixed with limestone
Water gas (mixture of CO and H2) produced from natural gas (methane CH4)
Pure carbon monoxide (CO) produced from metallurgical coke
14.
Solid ionic compounds such as crystal NaCl do NOT conduct electricity in the solid state because:
Electrons are moving too rapidly
They contain no electrical charges
Their ions are tightly locked in fixed positions within the rigid crystal lattice and cannot move freely
They decompose in the presence of air
15.
The number of amino acid molecules in a polypeptide chain resulting from mRNA translation consisting of 303 nucleotides, including the start and stop codons, is equal to:
100 Amino acid
99 Acid
300 Acid
101 Acid
16.
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
Graaf's vesicle
Uterine cavity
Ovaries before ovulation
17.
A segment of a DNA double helix consisting of 600 nucleotides. The number of complete turns in this segment is equal to:
15 roll
10 Rolls
60 roll
30 Full roll
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
50,000 N
5000 N
2500 N
19.
The sequence is repeated more than one hundred thousand times in the middle of one of the chromosomes of the Drosophila insect (fruit fly) and does not code for any protein:
TATAAT
UAA
AUG
AGACT
20.
A hormone secreted from the anterior lobe of the pituitary gland that stimulates the growth of Graafian follicles in the female ovary and the production of sperm in the male testicle is:
Prolactin hormone
ACTH hormone
Luteinizing hormone (LH)
follicle stimulating hormone (FSH)
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