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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: Structure of Earth, Geological Time and Structural Geology

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  • Questions count: 18
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1.
Why is the genetic code described as 'degenerate' or 'redundant'?
The genetic code decays as the cell ages.
Multiple different codons can code for the same single amino acid.
One codon can code for multiple different amino acids.
The genetic code differs completely between bacteria and humans.
2.
To distinguish between a white precipitate of barium sulfate (BaSO4) and a white precipitate of barium phosphate (Ba3(PO4)2), one should add:
Concentrated nitric acid in the dark
Ammonium hydroxide solution
Dilute hydrochloric acid (Ba3(PO4)2 dissolves while BaSO4 remains insoluble)
Boiling distilled water
3.
The indicator that exhibits a yellow color in acidic medium, blue in alkaline medium, and green in neutral medium is:
Bromothymol blue
Methyl orange
Phenolphthalein
Litmus solution
4.
While the students ________ in the art workshop, the tour guide arrived.
were working
worked
are working
work
5.
The derivative of f(x) = 4 x3 - 5 x2 + 7 x - 9 with respect to x is:
f'(x) = 12 x2 - 10 x + 7
f'(x) = 12 x2 - 10 x
f'(x) = 4 x2 - 5 x + 7
f'(x) = 12 x3 - 10 x2 + 7
6.
Using the Quotient Rule, the derivative of y = (x + 3) / (x - 2) for x != 2 is:
5 / (x - 2)2
-5 / (x - 2)2
(2x + 1) / (x - 2)2
1 / (x - 2)2
7.
The universal gas constant R in SI units has the numerical value and dimensions of:
8.314 J / (mol . K)
6.022 x 1023 J / K
0.0821 J / mol
1.38 x 10−23 Pa . m3
8.
The nitrogen molecule (N2) contains a:
Coordinate dative bond
Triple covalent bond (one sigma bond and two pi bonds) sharing 3 electron pairs
Single ionic bond
Double covalent bond
9.
Beta cells in the islets of Langerhans in the pancreas are responsible for secreting the hormone:
Glucagon
Somatostatin
Pepsin
Insulin
10.
The salivary glands and sweat glands in the human body are examples of:
Aductal endocrine glands
Exocrine ductal glands discharge their secretions through special channels outside the bloodstream
Steroid tissue
Common glands
11.
The lymphocytes responsible for secreting specific antibodies in humoral immunity are:
Helper T cells (TH)
Plasma B cells
Macrophages
Natural killer (NK) cells
12.
Peyer's spots's Patches) Tiny lymph nodes spread in the mucous membrane lining the:
esophagus
Pharynx
Lower part of the small intestine (ileum)
Stomach
13.
The cells that suppress and inhibit the immune response after eliminating the microbe and secrete lymphokine proteins are:
Neutrophil cells
Suppressor T cells
Helper T cells (Th)
Plasma cells
14.
The umbilical cord in the human fetus contains blood vessels that are characterized by:
All its vessels carry oxygenated blood
One artery and two veins
Two arteries transport deoxygenated blood and waste from the fetus to the placenta, and one vein transports oxygenated blood and nutrients from the placenta to the fetus.
Devoid of blood vessels
15.
Hydra and planaria share the ability to reproduce asexually by:
Regeneration
Budding only
Longitudinal binary fission
Bacteria formation
16.
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:
Methionine and tryptophan
Glutamic acid and aspartic acid
Glycine and alanine
Arginine and lysine (Arginine & Lysine)
17.
The first human protein produced commercially using recombinant DNA technology to treat diabetics is:
Interferon protein
Growth hormone
Human hormone insulin (Insulin)
Hemoglobin
18.
In eukaryotic cells, rRNA molecules are synthesized and assembled under ribosomal subunits within:
Golgi apparatus
Smooth endoplasmic reticulum
directly into the cytoplasm
Nucleolus
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