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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 2 Quiz: Recombinant DNA, Gene Cloning, PCR and Genetic Engineering

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  • Questions count: 19
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1.
The atomic radii of the elements from Chromium to Copper remain remarkably steady and nearly constant across the first transition series because of:
Decreasing ionization energies
The mutual compensation between the increasing nuclear charge and the repulsive forces among accumulated 3d electrons
The sudden increase in atomic mass
The identical number of neutrons in their nuclei
2.
An aqueous solution of titanium(IV) chloride (TiCl4) is diamagnetic and colorless because:
The Ti4+ ion has an electronic configuration of [Ar] 3d0, devoid of unpaired d-electrons
Titanium is an alkali earth metal
It absorbs all visible wavelengths of light
Chlorine ions quench all magnetic dipoles
3.
A person who skillfully makes beautiful objects by hand is called a/an ________.
engineer
artisan
pilot
scientist
4.
Phenolphthalein indicator cannot distinguish between an acidic solution and a neutral solution because:
It is red in both
It precipitates in both
It is blue in both
It is colorless in both
5.
The hormone responsible for maintaining the balance of minerals in the blood by stimulating the reabsorption of sodium ions and eliminating excess potassium through the kidneys is:
Aldosterone
Cortisol hormone
Insulin hormone
Thyroxine hormone
6.
Antidiuretic hormone (ADH/vasopressin) works to raise blood pressure by:
Smooth blood vessel constriction and water reabsorption in nephrons
Expansion of the arteries
Sodium excretion in urine
Stimulate sweat
7.
The pituitary gland is considered the master of the endocrine glands (the maestro) because:
Secretes digestive enzymes
Connected to the liver
It secretes stimulating hormones that control the secretions of most other endocrine glands in the body, such as the thyroid, adrenals, and gonads
The largest gland by weight
8.
When severe dehydration and decreased blood volume and body fluids occur, which of the following hormonal changes occur?
Thyroxine secretion stops
Calcitonin secretion increases
ADH decreases and insulin increases
The secretion of ADH and aldosterone increases to restore water and salts
9.
The two hormones that are secreted from the mucous membrane of the small intestine to stimulate the pancreas to secrete its digestive juices are:
Thyroxine and calcitonin
Insulin and glucagon
Secretin and cholecystokinin (Secretin & CCK)
Prolactin and oxytocin
10.
Beta cells in the islets of Langerhans in the pancreas are responsible for secreting the hormone:
Glucagon
Pepsin
Somatostatin
Insulin
11.
The chemical compound secreted by mast cells and basal white blood cells that is responsible for the widening of blood vessels and symptoms of inflammation is:
Interleukin
Heparin
Albumin
Histamine
12.
The lymphatic organ, which is called the graveyard of old and worn-out red blood cells and contains large numbers of macrophages, is:
Spleen
Thymus gland
Tonsils
appendix
13.
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
14.
The apple is considered a false fruit from a morphological and anatomical perspective because:
Produced from a hermaphrodite flower
The cup leaves become greasy
The edible, fatty part that is lubricated by food is the takht, not the ovary of the flower
It is made without seeds
15.
The umbilical cord in the human fetus contains blood vessels that are characterized by:
Two arteries transport deoxygenated blood and waste from the fetus to the placenta, and one vein transports oxygenated blood and nutrients from the placenta to the fetus.
All its vessels carry oxygenated blood
One artery and two veins
Devoid of blood vessels
16.
Combined contraceptive pills are considered an effective method because they:
It contains synthetic hormones similar to estrogen and progesterone that inhibit the secretion of FSH and LH from the pituitary, thus preventing the maturation of eggs and the occurrence of ovulation.
It kills sperm
The fallopian tubes close mechanically
Placental abruption
17.
The enzyme used in the crucial experiment to verify the experiments of Avery and his colleagues, which completely analyzes DNA and does not affect protein or RNA, is:
Deoxyribonuclease enzyme
pepsin enzyme
DNA polymerase enzyme
Ribonuclease enzyme
18.
The enzyme responsible for constructing an mRNA strand from one of the two DNA strands (template strand 3' to 5') he:
DNA polymerase enzyme
Palace enzyme
Binding enzyme
RNA polymerase
19.
The enzyme extracted from RNA viruses and used to convert mRNA into a single strand of complementary DNA (cDNA) is:
Reverse transcriptase
Palace enzyme
RNA polymerase enzyme
Ligase enzyme
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