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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.
An air bubble released from the bottom of a deep lake expands in volume as it rises towards the surface because:
The hydrostatic pressure decreases as depth decreases, allowing the trapped air to expand according to Boyle's law
The bubble absorbs water molecules into its gas phase
The water temperature at the surface is near absolute zero
Atmospheric pressure increases at the surface
2.
The mechanical advantage (eta) of an ideal hydraulic press equals all of the following ratios EXCEPT:
Area of the large piston / Area of the small piston (A / a)
Force on the large piston / Force on the small piston (F / f)
Work done by the large piston / Work done on the small piston > 1
Distance moved by the small piston / Distance moved by the large piston (y1 / y2)
3.
To distinguish between a white precipitate of barium sulfate (BaSO4) and a white precipitate of barium phosphate (Ba3(PO4)2), one should add:
Dilute hydrochloric acid (Ba3(PO4)2 dissolves while BaSO4 remains insoluble)
Boiling distilled water
Concentrated nitric acid in the dark
Ammonium hydroxide solution
4.
Double fertilization in flowering plants involves two fusions:
The fusion of two pollen grains with one egg
Fusion of petals with sepals
Chromosome duplication in Takht cells
The fusion of the zygote nucleus (N) with the egg nucleus (N) to form the zygote (2N), and the fusion of the second nuclei (N) with the two polar nuclei (2N) to form the sperm nucleus.Dosperm (3N)
5.
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
6.
The pituitary gland is considered the master of the endocrine glands (the maestro) because:
The largest gland by weight
It secretes stimulating hormones that control the secretions of most other endocrine glands in the body, such as the thyroid, adrenals, and gonads
Connected to the liver
Secretes digestive enzymes
7.
An aqueous solution of titanium(IV) chloride (TiCl4) is diamagnetic and colorless because:
It absorbs all visible wavelengths of light
Chlorine ions quench all magnetic dipoles
Titanium is an alkali earth metal
The Ti4+ ion has an electronic configuration of [Ar] 3d0, devoid of unpaired d-electrons
8.
I have already booked the flight tickets. I ________ to London next Friday.
will travel
traveled
am traveling
travel
9.
Histone proteins responsible for shortening the length of the DNA molecule ten times and forming nucleosomes are characterized by being rich in the two basic amino acids:
Glycine and alanine
Methionine and tryptophan
Arginine and lysine (Arginine & Lysine)
Glutamic acid and aspartic acid
10.
Asexual reproduction differs from sexual reproduction in that:
It is based on a single parental individual and maintains genetic stability over generations because it is based on mitosis
Provides great genetic diversity
It always requires the formation of gametes
Expensive in energy and time
11.
In the arithmetic sequence (3, 7, 11, 15, ...), the common difference d and the 20th term (T_20) are respectively:
d = 4 and T_20 = 79
d = 5 and T_20 = 98
d = 3 and T_20 = 60
d = 4 and T_20 = 83
12.
The nitrogen molecule (N2) contains a:
Double covalent bond
Single ionic bond
Triple covalent bond (one sigma bond and two pi bonds) sharing 3 electron pairs
Coordinate dative bond
13.
An ionic bond is formed primarily between:
Noble gas atoms at very low temperatures
A metal atom that loses electrons forming a cation and a non-metal atom that gains electrons forming an anion due to electrostatic attraction
Two non-metal atoms sharing pairs of valence electrons equally
Positive metal ions immersed in a sea of delocalized electrons
14.
Solid ionic compounds such as crystal NaCl do NOT conduct electricity in the solid state because:
Electrons are moving too rapidly
They decompose in the presence of air
They contain no electrical charges
Their ions are tightly locked in fixed positions within the rigid crystal lattice and cannot move freely
15.
The reaction between an acid and a base to produce a salt and water is known as a:
Neutralization reaction
Polymerization reaction
Thermal decomposition reaction
Combustion reaction
16.
A transition element whose +5 oxidation state compound (V2O5) is widely utilized as an industrial catalyst in the Contact Process for sulfuric acid manufacturing and as a colorant in ceramics is:
Scandium (21Sc)
Cobalt (27Co)
Manganese (25Mn)
Vanadium (23V)
17.
The number of terms in the finite arithmetic sequence (5, 9, 13, ..., 81) is:
21 terms
19 terms
20 terms
25 terms
18.
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:
6 Polar bodies
3 Polar bodies
9 Polar bodies (assuming division of the first polar body)
12 A polar body
19.
DNA Repair Enzymes, which number approximately 20 enzymes, depend for their work on:
The presence of a corresponding healthy template strip complementary to the damaged strip to guide its sequence in repair
Production of lipoproteins
Heat irradiation of the cell
Destruction of the infected cell
20.
The apple is considered a false fruit from a morphological and anatomical perspective because:
It is made without seeds
The cup leaves become greasy
The edible, fatty part that is lubricated by food is the takht, not the ovary of the flower
Produced from a hermaphrodite flower
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