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Biology & Geology

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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Quiz

Lesson 2 Quiz: Rock Cycle, Minerals, Crystallography and Weathering

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1.
Mutations that are inherited to future generations and occur in reproductive cells that produce gametes are called:
Somatic mutations
Temporary spikes
Rebound mutations
Gamete mutations
2.
The sum to infinity of the geometric series 12 + 6 + 3 + 1.5 + ... equals:
24
Infinity
36
18
3.
Asexual reproduction differs from sexual reproduction in that:
It is based on a single parental individual and maintains genetic stability over generations because it is based on mitosis
Expensive in energy and time
It always requires the formation of gametes
Provides great genetic diversity
4.
A metallic cube of side length 10 cm and density 7800 kg/m3 is completely submerged in water (density 1000 kg/m3). The buoyant force (upthrust) acting on the cube is (g = 10 m/s2):
10 N
68 N
100 N
78 N
5.
If a, b, c form a geometric sequence of positive real numbers, the geometric mean b equals:
b = (a + c) / 2
b = + sqrt(a * c)
b = a2 + c2
b = a * c
6.
The slope of the tangent line to the curve y = x2 - 6 x + 5 at the point (4, -3) equals:
m = 2
m = -3
m = 8
m = -2
7.
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
Glutamic acid and aspartic acid
Methionine and tryptophan
8.
Monocytes are functionally capable of leaving the bloodstream when needed:
Transformation into B cells
Antibody formation
Histamine secretion
Transform into active macrophages to engulf microbes and cellular debris
9.
Which of the following immune structures represents the first line of defense in the human body to prevent the entry of pathogens?
Antibodies
Macrophages
Intact skin with its stratum corneum, mucus, HCl in the stomach, and saliva saturated with lysozyme
Toxic T cells
10.
The number of codons that code for the 20 amino acids in the genetic table is equal to:
20 Codona
32 Codona
64 Codona
61 Codons (out of a total of 64 codons after excluding the three stop codons)
11.
The Ideal Gas Law combining all empirical gas relationships is mathematically formulated as:
P / V = n * R * T
P * T = n * R * V
P * V = m * g * h
P * V = n * R * T
12.
The location where fertilization of the egg by the sperm occurs in the human female reproductive system is:
Directly to the ovary
First third of the fallopian tube (near the infundibulum)
Internal uterine cavity
the vagina
13.
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
14.
The Cowper glands and the prostate gland in the male reproductive system secrete an alkaline fluid that passes into the urethra to:
Balancing the acidity of the urethra to ensure the passage and safety of sperm
Secretion of testosterone
Semen storage
Sperm production
15.
The enzyme found in the apical body (Acrosome) of the sperm that helps it penetrate the compact envelope of the egg is:
Cholinesterase enzyme
pepsin enzyme
Hyaluronidase enzyme
Amylase enzyme
16.
If (x - 1, x + 2, 3x) form a geometric sequence, the positive value of x is:
6
3
4
2
17.
If y = sin(3x) + cos(2x), then dy/dx at x = 0 equals:
-2
3
5
1
18.
The sum to infinity of the geometric series 16 + 8 + 4 + 2 + ... equals:
30
32
64
24
19.
If y = (2x + 1) * (3x - 4), then dy/dx evaluated at x = 1 equals:
-5
7
12
1
20.
A person who skillfully makes beautiful objects by hand is called a/an ________.
pilot
scientist
engineer
artisan
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