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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 2 Quiz: Reproduction in Flowering Plants (Angiosperms)

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  • Questions count: 20
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1.
Common and economically beneficial chromosome duplication in the plant kingdom (such as strawberries, wheat, and apples) leads to:
Larger cells and tissues and larger, sweeter and more productive fruits
Loss of chlorophyll
Root loss
Plant sterility and death
2.
Which of the following hormones is considered a steroid hormone (derived from fat and cholesterol)?
Insulin
Progesterone and testosterone
Thyroxine
Growth hormone (GH)
3.
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
101 Acid
300 Acid
99 Acid
4.
The surface immune receptor characteristic of T helper cells (Th) that enables them to recognize the antigen complex with the MHC protein is:
CD3 receptor
CD8 receptor
CD4 receptor
BCR receptor
5.
The genetic code is characterized as universal because:
It consists of only two letters
It does not change with mutations
The same codons code for the same amino acids in all organisms from bacteria to humans, confirming the common origin of life
It is found in the nucleus only
6.
Which of the following alloys is classified as an interstitial alloy?
Duralumin (Aluminum and Copper)
Brass (Copper and Zinc)
Stainless steel (Iron, Chromium, and Nickel)
Carbon steel (Iron and Carbon where small carbon atoms occupy interstitial voids)
7.
Beta cells in the islets of Langerhans in the pancreas are responsible for secreting the hormone:
Glucagon
Pepsin
Somatostatin
Insulin
8.
The Cowper glands and the prostate gland in the male reproductive system secrete an alkaline fluid that passes into the urethra to:
Sperm production
Semen storage
Secretion of testosterone
Balancing the acidity of the urethra to ensure the passage and safety of sperm
9.
When dilute hydrochloric acid is added to a solid salt, a gas is evolved with a pungent odor that turns acidified potassium dichromate paper green while a colloidal yellow precipitate of sulfur separates in the reaction vessel. The anion is:
Sulfite (SO32−)
Sulfate (SO42−)
Thiosulfate (S2O32−)
Sulfide (S2−)
10.
Plant hormones are responsible for the phenomenon of leaf fall and fruit ripening and falling. Where the role of a hormonal gas increases:
Gibberellic acid
Auxin IAA
Abscisic acid
Ethylene gas
11.
Using the Quotient Rule, the derivative of y = (x + 3) / (x - 2) for x != 2 is:
1 / (x - 2)2
(2x + 1) / (x - 2)2
5 / (x - 2)2
-5 / (x - 2)2
12.
The slope of the tangent line to the curve y = x2 - 6 x + 5 at the point (4, -3) equals:
m = 8
m = -2
m = 2
m = -3
13.
Solid ionic compounds such as crystal NaCl do NOT conduct electricity in the solid state because:
Their ions are tightly locked in fixed positions within the rigid crystal lattice and cannot move freely
Electrons are moving too rapidly
They contain no electrical charges
They decompose in the presence of air
14.
Cultivation of plant tissues in a semi-natural nutrient medium (such as coconut milk) is scientific proof of:
The necessity of double fertilization
Effect of thyroxine
Seeds are asexual
A complete living plant cell contains all the genetic information necessary to form a new complete plant
15.
Which of the following organisms has its genetic material as a single molecule of RNA rather than DNA?
Yeast
Bacteriophage T2
Human immunodeficiency virus (HIV), polio virus, influenza and coronavirus
Escherichia coli bacteria
16.
The atom in the pentose sugar molecule (dioxyribose) to which the nitrogenous base is linked by a covalent bond is:
Carbon atom number 1' (C1')
Carbon atom number 3'
Carbon atom number 5'
Carbon atom number 2'
17.
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
Iron(III) sulfate only
Elemental iron and sulfur dioxide
Iron(II) sulfate and hydrogen gas only
18.
The sum to infinity of the geometric series 16 + 8 + 4 + 2 + ... equals:
64
24
30
32
19.
Rotational cytoplasmic movement inside living plant cells (such as Elodea plants) is indicated by:
Movement of chloroplasts immersed in the cytoplasm stream in a constant rotational direction
Stomata open
Mitochondrial division
Change in cell wall thickness
20.
The pressure of a gas trapped inside an incandescent light bulb is 0.8 atm at room temperature (27 °C). When the bulb operates, the filament heats the gas to 327 °C at constant volume. The operational pressure is:
0.96 atm
1.6 atm
2.4 atm
1.2 atm
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