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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: 20
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1.
If a particle moves along a straight line such that its position s(t) = t3 - 6 t2 + 9 t meters, the particle comes to an instantaneous rest (velocity v(t) = 0) at times:
t = 0 seconds only
t = 6 seconds
t = 2 seconds and t = 4 seconds
t = 1 second and t = 3 seconds
2.
Injection with serum (Antiserum) containing ready-made antibodies to neutralize scorpion venom gives the patient immunity:
Cellular induced
Innate
Lasting positivity
A rapid and temporary acquired negativity that is not accompanied by memory cells
3.
The decisive experiment for Hershey and Chase (Hershey & Chase) To prove that DNA is the genetic material of bacteriophages, I relied on:
Radioactive nitrogen and carbon numbering
Isolation of bacterial plasmids
Radioactive phosphorus numbering P-32 in DNA and radioactive sulfur numbering S-35 in the protein envelope
Use of deoxyribonuclease enzyme to analyze protein
4.
The atom in the pentose sugar molecule (dioxyribose) to which the nitrogenous base is linked by a covalent bond is:
Carbon atom number 2'
Carbon atom number 5'
Carbon atom number 1' (C1')
Carbon atom number 3'
5.
Which of the following first-row transition metal ions exhibits the highest theoretical magnetic moment in its ground state?
Fe3+ ([Ar] 3d5 with 5 unpaired electrons)
Cu2+ ([Ar] 3d9 with 1 unpaired electron)
Cr3+ ([Ar] 3d3 with 3 unpaired electrons)
Zn2+ ([Ar] 3d10 with 0 unpaired electrons)
6.
In prokaryotic cells (such as bacteria), a single circular DNA molecule attaches to the plasma membrane at:
One or more sites from which DNA replication begins
Centrosome
Nuclear envelope
Ribosome
7.
Bacterial restriction endonucleases recognize specific nucleotide sequences called recognition sites, and are characterized by:
Palindromes of 4 to 8 pairs read in the same order on both strands in 5′ direction.' to 3'
Stop codons only
Asymmetric repetitive sequences
Lipoprotein molecules
8.
Which enzyme is responsible for linking Okazaki fragments into a continuous strand during lagging strand replication?
DNA Ligase
Reverse Transcriptase
DNA Polymerase
DNA Helicase
9.
If the tangent to y = x2 - 4x + 5 is parallel to the x-axis, the point of tangency is:
(4, 5)
(2, 1)
(2, 0)
(0, 5)
10.
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:
Arginine and lysine (Arginine & Lysine)
Glycine and alanine
Methionine and tryptophan
Glutamic acid and aspartic acid
11.
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
Pollen granules only
Dead wood cells
Cork cells
12.
Which of the following conditions leads to increased secretion of parathormone from the parathyroid glands?
Excessive vitamin D excess
Low phosphate
Low level of ionized calcium in blood plasma
High blood calcium level
13.
The slope of the tangent line to the curve y = x2 - 6 x + 5 at the point (4, -3) equals:
m = -3
m = 8
m = -2
m = 2
14.
To distinguish between a white precipitate of barium sulfate (BaSO4) and a white precipitate of barium phosphate (Ba3(PO4)2), one should add:
Concentrated nitric acid in the dark
Ammonium hydroxide solution
Boiling distilled water
Dilute hydrochloric acid (Ba3(PO4)2 dissolves while BaSO4 remains insoluble)
15.
Vaccination gives humans immunity:
Temporary negativity that disappears within weeks
Not specialized
Acquired long-term positivity for the formation of memory cells
Innate, inherited
16.
Which of the following oxides is amphoteric?
MgO
SO3
ZnO
Na2O
17.
In the secondary immune response upon exposure to the microbe for the second time, the response is characterized as:
It is very rapid and produces huge amounts of antibodies thanks to memory cells, and the individual does not show symptoms of the disease
Rely only on the first line of defense
Limited to non-specialized immunity
Slow and takes days
18.
The genetic code is characterized as universal because:
The same codons code for the same amino acids in all organisms from bacteria to humans, confirming the common origin of life
It is found in the nucleus only
It does not change with mutations
It consists of only two letters
19.
Sticky Ends resulting from the action of shortening enzymes are characterized by:
Inactive phosphate sequences
Collagen thickened ends
Short, extended single strands of unpaired nucleotides capable of spontaneous association with complementary ends
Ends surrounded by peptide bonds
20.
Real gases behave most closely to an ideal gas under conditions of:
Extremely high pressure and low temperature
Zero gravitational acceleration
Very low pressure and high temperature (where intermolecular attraction forces and molecular volumes become negligible)
High pressure and near liquefaction point
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