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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: Plant Immunity (Structural and Biochemical Defense)

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  • Questions count: 20
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1.
If both the absolute temperature and the absolute pressure of a confined ideal gas are doubled, the volume of the gas:
Decreases to one-fourth
Doubles to twice its original volume
Remains constant and unchanged
Quadruples
2.
Which enzyme is responsible for linking Okazaki fragments into a continuous strand during lagging strand replication?
DNA Polymerase
DNA Helicase
Reverse Transcriptase
DNA Ligase
3.
The two sites on the subunit of the ribosomal subunit where the two tRNA molecules stabilize during polypeptide chain elongation are:
Location 5' And site 3'
Coiling site and binding site
Peptidyl site (P) and aminoacyl site (A)
The location of the palace and the location of the IUD
4.
The motile phase (motile zygote / ookinete) in the life cycle of Plasmodium malaria is characterized by:
It attacks red blood cells
Haploid group N
It is diploid (2N) and penetrates the mosquito's stomach wall and turns into an egg sac
It secretes malaria toxin
5.
The hormone that affects both glandular and non-glandular tissue in the adult female body is:
Aldosterone hormone
Growth hormone
Calcitonin hormone
Oxytocin
6.
The enzyme responsible for constructing an mRNA strand from one of the two DNA strands (template strand 3' to 5') he:
RNA polymerase
Palace enzyme
Binding enzyme
DNA polymerase enzyme
7.
The relative density (specific gravity) of a substance is defined as:
The product of density and the acceleration due to gravity
The reciprocal of the buoyant force
The ratio of the density of the substance to the density of pure water at 4°C
The mass of the substance divided by its volume at 100°C
8.
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
9.
The enzyme responsible for separating the two strands of DNA from each other by breaking hydrogen bonds during replication is:
DNA polymerase
Ligase
Palace enzyme
Helicase enzyme
10.
The antibody that is transferred across the placenta from the blood of the pregnant mother to the blood of the fetus to give it natural, passive, acquired immunity is:
IgE
IgD
IgM
IgG
11.
DNA polymerase always adds new nucleotides in a specific direction:
From party 5' To party 3' For new growing bar only
In both directions together
randomly
From party 3' to 5' only
12.
If y = (2x + 1) * (3x - 4), then dy/dx evaluated at x = 1 equals:
7
1
12
-5
13.
According to the Chain Rule, if y = (3 x2 - 5)4, then dy/dx is:
6 x (3 x2 - 5)3
4 (3 x2 - 5)3
24 x (3 x2 - 5)3
12 x (3 x2 - 5)4
14.
A segment of a DNA double helix consisting of 600 nucleotides. The number of complete turns in this segment is equal to:
30 Full roll
60 roll
15 roll
10 Rolls
15.
Complements are a group of plasma proteins that activate when an antibody binds to an antigen and work to:
Decomposing the antigenic envelope and dissolving its contents to facilitate their ingestion by macrophages
Activate viruses
Blood clotting
Histamine secretion
16.
The lymphocytes responsible for secreting specific antibodies in humoral immunity are:
Natural killer (NK) cells
Helper T cells (TH)
Plasma B cells
Macrophages
17.
When severe dehydration and decreased blood volume and body fluids occur, which of the following hormonal changes occur?
The secretion of ADH and aldosterone increases to restore water and salts
Thyroxine secretion stops
Calcitonin secretion increases
ADH decreases and insulin increases
18.
The standard start codon in an mRNA molecule recognized by the first tRNA molecule carrying methionine is:
UAG
UGA
AUG
UAA
19.
If a, b, c form an arithmetic sequence, then the arithmetic mean b equals:
b = (a + c) / 2
b = a + c
b = 2 a c / (a + c)
b = sqrt(a * c)
20.
Monocytes are functionally capable of leaving the bloodstream when needed:
Histamine secretion
Antibody formation
Transformation into B cells
Transform into active macrophages to engulf microbes and cellular debris
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