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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: Movement in Plants and Muscle Contraction Mechanics in Humans

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  • Questions count: 20
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1.
The hormone responsible for maintaining the balance of minerals in the blood by stimulating the reabsorption of sodium ions and eliminating excess potassium through the kidneys is:
Insulin hormone
Thyroxine hormone
Cortisol hormone
Aldosterone
2.
Injection with serum (Antiserum) containing ready-made antibodies to neutralize scorpion venom gives the patient immunity:
Innate
A rapid and temporary acquired negativity that is not accompanied by memory cells
Lasting positivity
Cellular induced
3.
The covalent chemical bond that connects the heavy and light peptide chains in an antibody molecule is:
Additional peptide bonds
Ionic bonds
Disulfide Bonds - S-S
Weak hydrogen bonds
4.
The main chemical reducing agent inside the Midrex furnace and its industrial source are respectively:
Pure carbon monoxide (CO) produced from metallurgical coke
Water gas (mixture of CO and H2) produced from natural gas (methane CH4)
Carbon dioxide mixed with limestone
Hydrogen gas produced from the electrolysis of water
5.
Acids are chemical compounds that dissociate in aqueous solutions to produce:
Hydroxide ions (OH-) turning red litmus paper blue
Sodium ions and chlorine gas
Precipitated metallic salts
Hydrogen ions (H+ or hydronium ions H3O+), turning blue litmus paper red
6.
Pascal's principle states that when pressure is applied to an enclosed, incompressible fluid, it is transmitted:
Undiminished to every portion of the fluid and to the walls of the containing vessel
Only downwards towards the bottom of the vessel
With an exponential decay as distance increases
Strictly to compressible gases
7.
A neuromuscular connection (neuromuscular synapse) is found at a connection site:
Terminal branching of the axon of a motor neuron with the motor end plate of a muscle fiber
One muscle with another adjacent muscle
Dendritic branching with sensory nerve fiber
Actin filament with myosin filament
8.
When a gas trapped inside a rigid container of fixed volume is heated from 27 °C (300 K) to 127 °C (400 K), its pressure increases by a factor of:
127 / 27
16 / 9
2 times
4 / 3 (since P1 / T1 = P2 / T2)
9.
The enzyme extracted from RNA viruses and used to convert mRNA into a single strand of complementary DNA (cDNA) is:
Palace enzyme
RNA polymerase enzyme
Reverse transcriptase
Ligase enzyme
10.
In a U-tube manometer containing two immiscible liquids in equilibrium, the heights of the liquid columns measured above the separating surface are:
Equal regardless of the liquids used
Proportional to the square of the cross-sectional area of the tube
Directly proportional to their densities
Inversely proportional to their respective densities (h1 / h2 = rho2 / rho1)
11.
If cholinesterase is not secreted after muscle contraction, the inevitable result is:
Low blood sodium concentration
The state of depolarization continues and the muscle remains in a state of continuous contraction without relaxation
The muscle suddenly relaxes
Damage to myosin filaments
12.
In a titration experiment, 20.0 mL of 0.15 M H2SO4 is completely neutralized by 30.0 mL of NaOH solution. The molar concentration of the NaOH solution is:
0.30 M
0.05 M
0.10 M
0.20 M
13.
The enzyme that catalyzes the peptidyl transferase reaction and the formation of the peptide bond between amino acids during translation is:
DNA polymerase enzyme
Helix enzyme
Release factor protein
Part of the rRNA molecule that makes up the subunit of the ribosomal subunit
14.
Asexual reproduction differs from sexual reproduction in that:
Provides great genetic diversity
It always requires the formation of gametes
Expensive in energy and time
It is based on a single parental individual and maintains genetic stability over generations because it is based on mitosis
15.
The amount of DNA in a human female secondary oocyte compared to a resting somatic skin cell (before replication begins) is:
Half the quantity
Equal (contains 46 DNA molecules in the form of 23 diploid chromosomes)
Quarter
Weakness
16.
What is the biochemical cause of continuous, non-relaxing muscle spasm that can cause muscular tearing?
Abrupt accumulation of excessive calcium ions in the synaptic cleft.
Excessive breakdown of acetylcholine by the enzyme acetylcholinesterase.
Complete depletion of cellular ATP molecules, preventing cross-bridge detachment.
Sudden accumulation of glucose inside glycogen granules.
17.
Auxins in plants (such as indole acetic acid (IAA)) are chemicals secreted from:
The growing tops and live plant buds are active and move to the response areas
Cork cells
Pollen granules only
Dead wood cells
18.
Peyer's spots's Patches) Tiny lymph nodes spread in the mucous membrane lining the:
esophagus
Pharynx
Stomach
Lower part of the small intestine (ileum)
19.
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:
300 Acid
101 Acid
100 Amino acid
99 Acid
20.
Stop codons that bind to the release factor to terminate the translation process are:
UAA And UAG and UGA
AAA And UUU and GGG
AUG And GUG and UUG
CCC And GGG and TTT
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