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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: Asexual and Sexual Reproduction and Alternation of Generations

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  • Questions count: 19
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1.
Why is the genetic code described as 'degenerate' or 'redundant'?
Multiple different codons can code for the same single amino acid.
The genetic code differs completely between bacteria and humans.
One codon can code for multiple different amino acids.
The genetic code decays as the cell ages.
2.
Boyle's Law states that for a fixed mass of an ideal gas kept at constant temperature, the volume V is:
Directly proportional to absolute temperature
Directly proportional to pressure
Inversely proportional to its absolute pressure P (P1 * V1 = P2 * V2)
Independent of pressure changes
3.
Absolute zero temperature (0 Kelvin or -273.15 °C) is defined physically as the theoretical temperature at which:
All liquids solidify into glass
Atmospheric air completely combusts
The volume and pressure of an ideal gas theoretically extrapolate to zero and translational molecular motion reaches its quantum minimum
Water reaches its maximum density
4.
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:
2.4 atm
0.96 atm
1.2 atm
1.6 atm
5.
If both the absolute temperature and the absolute pressure of a confined ideal gas are doubled, the volume of the gas:
Remains constant and unchanged
Quadruples
Decreases to one-fourth
Doubles to twice its original volume
6.
The movement of hydrotropism in plant roots is considered tropism:
Negatively
Unaffected
randomly
Positive (the root bends in the direction of moisture and water concentration)
7.
The hormone that affects both glandular and non-glandular tissue in the adult female body is:
Oxytocin
Growth hormone
Aldosterone hormone
Calcitonin hormone
8.
The direct cause of myxedema in an adult is:
Excessive increase in growth hormone
Hyperactivity of the parathyroid gland
Severe deficiency in thyroxine secretion in adulthood
Insulin deficiency
9.
In the secondary immune response upon exposure to the microbe for the second time, the response is characterized as:
Rely only on the first line of defense
Limited to non-specialized immunity
Slow and takes days
It is very rapid and produces huge amounts of antibodies thanks to memory cells, and the individual does not show symptoms of the disease
10.
Reproduction by peaceful association in two adjacent threads of the spirogyra moss (Rem al-Barak) occurs in the case of:
Abundance of pure fresh water
The environment is exposed to drought, change in water purity, or change in temperature (unsuitable conditions)
Complete darkness
Mild spring
11.
The enzyme found in the apical body (Acrosome) of the sperm that helps it penetrate the compact envelope of the egg is:
pepsin enzyme
Amylase enzyme
Hyaluronidase enzyme
Cholinesterase enzyme
12.
Fructose, which is found in semen to nourish sperm outside the testicle, is secreted by:
Epididymis
The seminal vesicles
Prostate gland
Tomorrow Cooper
13.
Combined contraceptive pills are considered an effective method because they:
It contains synthetic hormones similar to estrogen and progesterone that inhibit the secretion of FSH and LH from the pituitary, thus preventing the maturation of eggs and the occurrence of ovulation.
The fallopian tubes close mechanically
It kills sperm
Placental abruption
14.
The maximum number of pollen grains that can be produced from the anther of a flower containing 4 sacs, each sac with 20 germinal cells (2N) is:
320 Pollen pill
640 grain
80 grain
160 grain
15.
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
12 A polar body
3 Polar bodies
9 Polar bodies (assuming division of the first polar body)
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:
Glycine and alanine
Glutamic acid and aspartic acid
Methionine and tryptophan
Arginine and lysine (Arginine & Lysine)
17.
DNA Repair Enzymes, which number approximately 20 enzymes, depend for their work on:
Production of lipoproteins
Destruction of the infected cell
Heat irradiation of the cell
The presence of a corresponding healthy template strip complementary to the damaged strip to guide its sequence in repair
18.
The number of codons that code for the 20 amino acids in the genetic table is equal to:
61 Codons (out of a total of 64 codons after excluding the three stop codons)
20 Codona
32 Codona
64 Codona
19.
The genetic code is characterized as universal because:
It consists of only two letters
The same codons code for the same amino acids in all organisms from bacteria to humans, confirming the common origin of life
It does not change with mutations
It is found in the nucleus only
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