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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: Identification of DNA as Genetic Material

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  • Questions count: 20
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1.
Phenolphthalein indicator cannot distinguish between an acidic solution and a neutral solution because:
It is blue in both
It precipitates in both
It is colorless in both
It is red in both
2.
The slope of the tangent line to the curve y = x2 - 6 x + 5 at the point (4, -3) equals:
m = 8
m = -2
m = -3
m = 2
3.
Electric buses and monorails produce zero exhaust fumes, making them ________ forms of transport.
noisy
eco-friendly
polluting
dangerous
4.
Watch out! The ladder is shaking violently. You ________ fall!
were
have
are going to
will
5.
A mercury manometer connected to a gas tank shows the mercury level in the free arm is 4 cm higher than the gas arm (Pa = 76 cm Hg). The gas pressure is:
76 cm Hg
4 cm Hg
80 cm Hg
72 cm Hg
6.
The two hormones that are secreted from the mucous membrane of the small intestine to stimulate the pancreas to secrete its digestive juices are:
Secretin and cholecystokinin (Secretin & CCK)
Thyroxine and calcitonin
Insulin and glucagon
Prolactin and oxytocin
7.
The sum to infinity of the geometric series 12 + 6 + 3 + 1.5 + ... equals:
Infinity
24
18
36
8.
Potters use high-temperature ovens called ________ to bake and harden clay vessels.
looms
fridges
blenders
kilns
9.
Why are hydroelectric storage dams constructed with a base that is significantly thicker than the crest?
To prevent solar radiation from penetrating the foundation
To allow fish to swim upstream through drainage gates
To reduce the gravitational pull of the bedrock
Because hydrostatic water pressure increases linearly with depth (P = rho * g * h), exerting immense overturning forces at the bottom
10.
Antidiuretic hormone (ADH/vasopressin) works to raise blood pressure by:
Smooth blood vessel constriction and water reabsorption in nephrons
Sodium excretion in urine
Expansion of the arteries
Stimulate sweat
11.
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
12.
The electronic configurations of both Chromium (24Cr) and Copper (29Cu) are anomalous due to the enhanced stability associated with:
Half-filled (3d5) and completely filled (3d10) d-subshells respectively
Completely empty 4s subshells
Pairing of all electrons in the outer valence level
High electronegativity differences
13.
An aqueous solution of titanium(IV) chloride (TiCl4) is diamagnetic and colorless because:
It absorbs all visible wavelengths of light
Chlorine ions quench all magnetic dipoles
The Ti4+ ion has an electronic configuration of [Ar] 3d0, devoid of unpaired d-electrons
Titanium is an alkali earth metal
14.
In a hydraulic press, the ratio of the cross-sectional area of the large piston to that of the small piston is 50. If a force of 100 N is exerted on the small piston, the maximum force exerted by the large piston is:
5000 N
2 N
2500 N
50,000 N
15.
A solution with a pH value of 3.0 is classified as:
Strongly acidic
Strongly alkaline
Weakly basic
Neutral
16.
An ionic bond is formed primarily between:
Two non-metal atoms sharing pairs of valence electrons equally
Noble gas atoms at very low temperatures
Positive metal ions immersed in a sea of delocalized electrons
A metal atom that loses electrons forming a cation and a non-metal atom that gains electrons forming an anion due to electrostatic attraction
17.
Hydra and planaria share the ability to reproduce asexually by:
Longitudinal binary fission
Budding only
Regeneration
Bacteria formation
18.
The apple is considered a false fruit from a morphological and anatomical perspective because:
The edible, fatty part that is lubricated by food is the takht, not the ovary of the flower
The cup leaves become greasy
Produced from a hermaphrodite flower
It is made without seeds
19.
Monocytes are functionally capable of leaving the bloodstream when needed:
Transform into active macrophages to engulf microbes and cellular debris
Antibody formation
Histamine secretion
Transformation into B cells
20.
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 0
Equals 1
Equals -1
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