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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: Support in Plants and the Human Skeletal System

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  • Questions count: 17
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1.
Why is the genetic code described as 'degenerate' or 'redundant'?
One codon can code for multiple different amino acids.
The genetic code differs completely between bacteria and humans.
The genetic code decays as the cell ages.
Multiple different codons can code for the same single amino acid.
2.
If a, b, c form an arithmetic sequence, then the arithmetic mean b equals:
b = sqrt(a * c)
b = a + c
b = (a + c) / 2
b = 2 a c / (a + c)
3.
If a, b, c form a geometric sequence of positive real numbers, the geometric mean b equals:
b = a * c
b = a2 + c2
b = (a + c) / 2
b = + sqrt(a * c)
4.
An air bubble released from the bottom of a deep lake expands in volume as it rises towards the surface because:
The bubble absorbs water molecules into its gas phase
Atmospheric pressure increases at the surface
The water temperature at the surface is near absolute zero
The hydrostatic pressure decreases as depth decreases, allowing the trapped air to expand according to Boyle's law
5.
A metallic bond is physically described as the electrostatic attraction between:
Positive ions and negative non-metal anions
Dipole molecules in a polar liquid
Positive metal cations in the crystal lattice and the mobile sea of delocalized valence electrons
Protons and neutrons in the nucleus
6.
What is the number of the vertebra to which the seventh pair of ribs in the human rib cage connect?
Paragraph No. 7
Paragraph No. 17
Paragraph No. 14 in the spine
Paragraph No. 12
7.
Which of the following describes the joints between the bones of the skull in the adult cerebrum?
Cartilaginous joints with very limited mobility allow head movement
Orbital joints enable the brain to expand when thinking
Widely mobile synovial joints contain serous synovial fluid
Fibrous, immobile joints that fuse with tough, toothed bone tissue with age
8.
The socket in which the head of the femur rests to form the highly mobile hip joint is:
Cavit valgus
Ulna cavity
The great hole
Acetabulum
9.
Which of the following describes the sternum in the human rib cage?
A solid cylindrical bone that connects to all the ribs
A movable bone that rotates half a revolution
A bone belonging to the peripheral skeleton
A flattened bone that is pointed at the bottom, its lower part is cartilaginous, and it is connected to the first 10 pairs of ribs.
10.
Thin, mobile protein filaments that connect to the Z lines in the sarcomere are:
Myosin filaments
Keratin threads
Actin filaments
Collagen threads
11.
The antibody that is transferred across the placenta from the blood of the pregnant mother to the blood of the fetus to give it natural, passive, acquired immunity is:
IgM
IgD
IgG
IgE
12.
The decomposition of the corpus luteum in the ovary of a non-pregnant woman at the end of the menstrual cycle results in:
Continued growth of the uterine lining
Placenta formation
Secretion of huge amounts of LH
A sharp drop in the concentration of the hormone progesterone leads to the breakdown of the uterine lining, the rupture of its capillaries, and the occurrence of menstruation
13.
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:
9 Polar bodies (assuming division of the first polar body)
6 Polar bodies
3 Polar bodies
12 A polar body
14.
A segment of a DNA double helix consisting of 600 nucleotides. The number of complete turns in this segment is equal to:
15 roll
60 roll
30 Full roll
10 Rolls
15.
The enzyme that catalyzes the peptidyl transferase reaction and the formation of the peptide bond between amino acids during translation is:
Release factor protein
Helix enzyme
Part of the rRNA molecule that makes up the subunit of the ribosomal subunit
DNA polymerase enzyme
16.
The number of codons that code for the 20 amino acids in the genetic table is equal to:
32 Codona
61 Codons (out of a total of 64 codons after excluding the three stop codons)
64 Codona
20 Codona
17.
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:
101 Acid
99 Acid
100 Amino acid
300 Acid
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