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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 outer embryonic membrane that surrounds the uterine membrane and from which digital villi emerge, which are immersed in the uterine lining to form the placenta, is:
Sagging membrane
umbilical cord
Amniotic membrane (Chorion)
Corpus luteum
2.
A transition element whose +5 oxidation state compound (V2O5) is widely utilized as an industrial catalyst in the Contact Process for sulfuric acid manufacturing and as a colorant in ceramics is:
Scandium (21Sc)
Cobalt (27Co)
Manganese (25Mn)
Vanadium (23V)
3.
If f(x) = |x - 3|, the derivative f'(3) at x = 3:
Does not exist because the left-hand derivative (-1) does not equal the right-hand derivative (+1)
Equals 1
Equals -1
Equals 0
4.
Why is the genetic code described as 'degenerate' or 'redundant'?
The genetic code differs completely between bacteria and humans.
One codon can code for multiple different amino acids.
Multiple different codons can code for the same single amino acid.
The genetic code decays as the cell ages.
5.
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
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
Secretion of huge amounts of LH
Placenta formation
6.
The Cowper glands and the prostate gland in the male reproductive system secrete an alkaline fluid that passes into the urethra to:
Sperm production
Semen storage
Secretion of testosterone
Balancing the acidity of the urethra to ensure the passage and safety of sperm
7.
When examining a patient who suffers from severe weight loss, bulging eyes, rapid heart rate, and high temperature, the doctor diagnoses the condition as:
Exophthalmos caused by excessive secretion of the hormone thyroxine
Diabetic urine
Dwarfism
Myxedema
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:
Amniotic membrane (Chorion)
Plasma membrane
Vitelline membrane
Amnion
9.
The volume expansion coefficient at constant pressure (alpha_v) of an ideal gas is physically measured using:
A venturi meter and manometer
A hydrometer
A torsion balance
Joly's bulb apparatus or Charles's apparatus with a dry mercury droplet index
10.
Which of the following hormones is secreted by the pituitary gland and indirectly affects basic metabolic processes and the speed of oxygen consumption?
Insulin hormone
Thyroid stimulating hormone (TSH).
The hormone oxytocin
ADH hormone
11.
A chemical substance used in the laboratory to cause mutations and chromosome duplication in the growing tips of plants is:
Sucrose solution
Hyaluronic acid
Colchicine, mustard gas, or nitrous acid
Glycerin
12.
Cultivation of plant tissues in a semi-natural nutrient medium (such as coconut milk) is scientific proof of:
A complete living plant cell contains all the genetic information necessary to form a new complete plant
Seeds are asexual
Effect of thyroxine
The necessity of double fertilization
13.
When dry chlorine gas is passed over red-hot iron filings, iron(III) chloride (FeCl3) is exclusively formed rather than iron(II) chloride because:
Chlorine cannot react with the inner 3d electrons
The reaction occurs strictly in an alkaline medium
Chlorine gas is a powerful oxidizing agent that readily oxidizes any formed Fe2+ to Fe3+
Iron(II) chloride spontaneously sublimes into thin air
14.
The genetic code is characterized as universal because:
It does not change with mutations
The same codons code for the same amino acids in all organisms from bacteria to humans, confirming the common origin of life
It consists of only two letters
It is found in the nucleus only
15.
The thermal multiplex device (PCR - Polymerase Chain Reaction) depends on an enzyme that tolerates high temperatures called:
Taq polymerase enzyme
RNA polymerase enzyme
Amylase enzyme
Human DNA polymerase enzyme
16.
Polyribosome is a vital cellular structure consisting of:
Mitochondrial aggregation
Accumulated peripheral granules
A large number of ribosomes (up to 100 ribosomes) attach to a single mRNA molecule to translate it simultaneously and quickly build many copies of the protein.
Fusion of two nuclei
17.
The slope of the tangent to the curve y = (x + 1)/(x - 1) at x = 2 is:
2
3
-1
-2
18.
The decisive experiment for Hershey and Chase (Hershey & Chase) To prove that DNA is the genetic material of bacteriophages, I relied on:
Radioactive phosphorus numbering P-32 in DNA and radioactive sulfur numbering S-35 in the protein envelope
Use of deoxyribonuclease enzyme to analyze protein
Radioactive nitrogen and carbon numbering
Isolation of bacterial plasmids
19.
The hormone that affects both glandular and non-glandular tissue in the adult female body is:
Oxytocin
Growth hormone
Aldosterone hormone
Calcitonin hormone
20.
The density of an ideal gas at temperature T and pressure P is rho. If the pressure is tripled and the absolute temperature is halved, the new density becomes:
1.5 rho
6 rho (since rho is proportional to P / T)
0.67 rho
3 rho
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