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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: Structure of Earth, Geological Time and Structural Geology

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  • Questions count: 17
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1.
If a double-stranded DNA sample contains 28% Adenine, what is the exact percentage of Cytosine in this sample?
22%
44%
56%
28%
2.
What is the structural characteristic of a restriction endonuclease recognition site?
It contains only adenine and thymine bases.
It always begins with the start codon AUG.
It consists of 15-20 repetitive nucleotides.
It is a palindromic sequence reading identical 5' to 3' on both strands.
3.
The n-th term of an arithmetic sequence with first term a and common difference d is given by:
T_n = a + n * d
T_n = 1/2 n (2a + d)
T_n = a + (n - 1) * d
T_n = a * rn − 1
4.
In the arithmetic sequence (3, 7, 11, 15, ...), the common difference d and the 20th term (T_20) are respectively:
d = 3 and T_20 = 60
d = 5 and T_20 = 98
d = 4 and T_20 = 83
d = 4 and T_20 = 79
5.
The derivative of y = sin(3x) with respect to x is:
3 cos(3x)
cos(3x)
-3 cos(3x)
3 sin(3x)
6.
If f(x) = |x - 3|, the derivative f'(3) at x = 3:
Equals 0
Equals 1
Equals -1
Does not exist because the left-hand derivative (-1) does not equal the right-hand derivative (+1)
7.
A hormone secreted from the anterior lobe of the pituitary gland that stimulates the growth of Graafian follicles in the female ovary and the production of sperm in the male testicle is:
Luteinizing hormone (LH)
ACTH hormone
follicle stimulating hormone (FSH)
Prolactin hormone
8.
The adrenal medulla is stimulated to secrete the emergency hormones adrenaline and noradrenaline via:
Body temperature change
Rapid and direct sympathetic nervous stimulation in cases of fear, fight, and flight
ACTH hormonal stimulation
High blood sugar
9.
What is the direct physiological effect of injecting a healthy person with an excessive dose of the hormone insulin?
Uric acid accumulation
Increased urine secretion
A severe drop in blood glucose levels (hypoglycemia) and hypoglycemic coma
A sharp increase in blood sugar
10.
The method of action of antibodies that is considered the most appropriate and most efficient in inactivating viruses and preventing their penetration into cells is:
Decomposition method
Neutralization method
Alignment method
Deposition method
11.
Vaccination gives humans immunity:
Innate, inherited
Not specialized
Temporary negativity that disappears within weeks
Acquired long-term positivity for the formation of memory cells
12.
Reproduction by peaceful association in two adjacent threads of the spirogyra moss (Rem al-Barak) occurs in the case of:
Abundance of pure fresh water
The environment is exposed to drought, change in water purity, or change in temperature (unsuitable conditions)
Complete darkness
Mild spring
13.
Party 3' For a DNA strand that ends with a group:
Free hydroxyl (-OH)
Free amine (-NH2)
Free phosphate (-PO4)
Free carboxylate (-COOH)
14.
The standard start codon in an mRNA molecule recognized by the first tRNA molecule carrying methionine is:
UAA
UGA
UAG
AUG
15.
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
16.
The anticodon on the tRNA molecule carrying methionine is:
CAU
GUA
UAC
AUG
17.
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
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