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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: Endocrine Glands, The Pituitary, Thyroid and Parathyroid Glands

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  • Questions count: 20
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1.
In a hydraulic press, the ratio of the cross-sectional area of the large piston to that of the small piston is 50. If a force of 100 N is exerted on the small piston, the maximum force exerted by the large piston is:
2 N
2500 N
50,000 N
5000 N
2.
The enzyme responsible for separating the two strands of DNA from each other by breaking hydrogen bonds during replication is:
Helicase enzyme
Palace enzyme
Ligase
DNA polymerase
3.
Absolute zero temperature (0 Kelvin or -273.15 °C) is defined physically as the theoretical temperature at which:
All liquids solidify into glass
The volume and pressure of an ideal gas theoretically extrapolate to zero and translational molecular motion reaches its quantum minimum
Atmospheric air completely combusts
Water reaches its maximum density
4.
Which of the following hormones is considered a steroid hormone (derived from fat and cholesterol)?
Progesterone and testosterone
Growth hormone (GH)
Thyroxine
Insulin
5.
In a hydraulic press, if the radius of the large piston is 4 times that of the small piston, the mechanical advantage is:
16
2
4
8
6.
The enzyme used in the crucial experiment to verify the experiments of Avery and his colleagues, which completely analyzes DNA and does not affect protein or RNA, is:
DNA polymerase enzyme
Deoxyribonuclease enzyme
Ribonuclease enzyme
pepsin enzyme
7.
The anticodon on the tRNA molecule carrying methionine is:
UAC
GUA
CAU
AUG
8.
The fetal membrane that directly surrounds the fetus and secretes a fluid that protects it from shock and dehydration and facilitates its movement is:
Amnion
Plasma membrane
Amniotic membrane (Chorion)
Vitelline membrane
9.
The contraceptive method that prevents the fertilized egg from settling in the uterine lining without hindering the ovulation or fertilization processes is:
Surgical ligation of the fallopian tubes
IUD
Contraceptive pills
Condom
10.
Reproduction by peaceful association in two adjacent threads of the spirogyra moss (Rem al-Barak) occurs in the case of:
The environment is exposed to drought, change in water purity, or change in temperature (unsuitable conditions)
Complete darkness
Mild spring
Abundance of pure fresh water
11.
Electric buses and monorails produce zero exhaust fumes, making them ________ forms of transport.
polluting
dangerous
noisy
eco-friendly
12.
Immunoglobulin (antibody), which exists as a pentamer and contains 10 sites to bind to the antigen is:
IgM
IgG
IgA
IgE
13.
An ionic bond is formed primarily between:
Two non-metal atoms sharing pairs of valence electrons equally
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
Positive metal ions immersed in a sea of delocalized electrons
14.
Mutations that are inherited to future generations and occur in reproductive cells that produce gametes are called:
Somatic mutations
Temporary spikes
Gamete mutations
Rebound mutations
15.
Pascal's principle states that when pressure is applied to an enclosed, incompressible fluid, it is transmitted:
Only downwards towards the bottom of the vessel
Strictly to compressible gases
Undiminished to every portion of the fluid and to the walls of the containing vessel
With an exponential decay as distance increases
16.
Hypersecretion of Growth Hormone (GH) in adult individuals leads clinically to:
Gigantism
Dwarfism
Acromegaly
Myxedema
17.
The salivary glands and sweat glands in the human body are examples of:
Exocrine ductal glands discharge their secretions through special channels outside the bloodstream
Common glands
Steroid tissue
Aductal endocrine glands
18.
Combined contraceptive pills are considered an effective method because they:
It kills sperm
Placental abruption
The fallopian tubes close mechanically
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.
19.
Bacterial restriction endonucleases recognize specific nucleotide sequences called recognition sites, and are characterized by:
Lipoprotein molecules
Palindromes of 4 to 8 pairs read in the same order on both strands in 5′ direction.' to 3'
Asymmetric repetitive sequences
Stop codons only
20.
The movement of hydrotropism in plant roots is considered tropism:
Positive (the root bends in the direction of moisture and water concentration)
Unaffected
Negatively
randomly
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