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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 1 Quiz: Types of RNA, Genetic Code and Protein Translation

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  • Questions count: 20
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1.
The chemical compound secreted by mast cells and basal white blood cells that is responsible for the widening of blood vessels and symptoms of inflammation is:
Heparin
Interleukin
Histamine
Albumin
2.
The two hormones that are secreted from the mucous membrane of the small intestine to stimulate the pancreas to secrete its digestive juices are:
Insulin and glucagon
Thyroxine and calcitonin
Prolactin and oxytocin
Secretin and cholecystokinin (Secretin & CCK)
3.
Which of the following alloys is classified as an interstitial alloy?
Carbon steel (Iron and Carbon where small carbon atoms occupy interstitial voids)
Stainless steel (Iron, Chromium, and Nickel)
Duralumin (Aluminum and Copper)
Brass (Copper and Zinc)
4.
The main chemical reducing agent inside the Midrex furnace and its industrial source are respectively:
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
Hydrogen gas produced from the electrolysis of water
5.
The number of hydrogen bonds between the nitrogenous base pair guanine and cytosine (G - C) is:
4 Links
3 Hydrogen bonds
Two hydrogen bonds
One bond
6.
The anticodon on the tRNA molecule carrying methionine is:
AUG
GUA
UAC
CAU
7.
Peyer's spots's Patches) Tiny lymph nodes spread in the mucous membrane lining the:
Pharynx
Lower part of the small intestine (ileum)
Stomach
esophagus
8.
The sum of the first n terms of an arithmetic sequence (S_n) is formulated as:
S_n = n / 2 * [ 2a + (n - 1) * d ] = n / 2 * [ a + l ]
S_n = a * (1 - rn) / (1 - r)
S_n = n * (a + d)
S_n = a / (1 - r)
9.
Sertoli cells in the seminiferous tubules of the human male testicle play a functional role in:
Secretion of testosterone
Meiosis to produce precursors
Excretion of fructose
The secretion of a fluid that nourishes sperm inside the testicle and is thought to have an immunological function
10.
In prokaryotic cells (such as bacteria), a single circular DNA molecule attaches to the plasma membrane at:
One or more sites from which DNA replication begins
Nuclear envelope
Centrosome
Ribosome
11.
The hormone that is secreted from the corpus luteum and reaches its maximum concentration on days 21 to 23 of menstruation is:
Estrogen
LH hormone
Progesterone
FSH hormone
12.
The pulling movement occurs in bulbs and corms (such as carcasses and daffodils) with the aim of:
Pull the stored ground leg down to an appropriate level from the soil surface to secure and support it against the wind
Getting rid of carbon dioxide
Light absorption for photosynthesis
Repel terrestrial insects
13.
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
14.
If both the absolute temperature and the absolute pressure of a confined ideal gas are doubled, the volume of the gas:
Doubles to twice its original volume
Quadruples
Decreases to one-fourth
Remains constant and unchanged
15.
The atom in the pentose sugar molecule (dioxyribose) to which the nitrogenous base is linked by a covalent bond is:
Carbon atom number 2'
Carbon atom number 5'
Carbon atom number 1' (C1')
Carbon atom number 3'
16.
The enzyme responsible for constructing an mRNA strand from one of the two DNA strands (template strand 3' to 5') he:
Binding enzyme
DNA polymerase enzyme
RNA polymerase
Palace enzyme
17.
Why are hydroelectric storage dams constructed with a base that is significantly thicker than the crest?
To prevent solar radiation from penetrating the foundation
To allow fish to swim upstream through drainage gates
Because hydrostatic water pressure increases linearly with depth (P = rho * g * h), exerting immense overturning forces at the bottom
To reduce the gravitational pull of the bedrock
18.
In Griffith's bacterial transformation experiment, mice died when they were injected with:
Live R bacteria alone
Sterile saline solution
Heat-killed S bacteria alone
A mixture of heat-killed S bacteria with live R bacteria
19.
The covalent chemical bond that connects the heavy and light peptide chains in an antibody molecule is:
Additional peptide bonds
Ionic bonds
Disulfide Bonds - S-S
Weak hydrogen bonds
20.
In the human female, the second (delayed/conditional) meiotic division of the secondary oocyte takes place in:
Graaf's vesicle
Uterine cavity
Ovaries before ovulation
The fallopian tube when the sperm enters the head for fertilization to occur
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