31. Which of the following is not a characteristic of pneumonia in animals?
[A] Inflammation of lungs
[B] Accumulation of mucus in alveoli
[C] Fever
[D] Easy breathing
Show Answer
Correct Answer: D [Easy breathing]
Notes:
Inflammation of the lungs, accumulation of mucus in alveoli, and fever are characteristics of pneumonia in animals.
32. Which of the following diseases is not caused by the RNA virus?
[A] Yellow fever
[B] Smallpox
[C] Mumps
[D] German measles
Show Answer
Correct Answer: B [Smallpox]
Notes:
Yellow fever, Mumps, and German measles are caused by the RNA virus. Whereas Smallpox is caused by the DNA virus.
33. The number of sex chromosomes in the zygote of humans is __
[A] 2
[B] 1
[C] 3
[D] 4
Show Answer
Correct Answer: A [2]
Notes:
The number of sex chromosomes in the zygote of humans is 2.
34. Which of the following hydrocarbons is produced by oil and fat feedstock?
[A] Bio-ethers
[B] Green Diesel
[C] Re-formulated gasoline
[D] All of the above
Show Answer
Correct Answer: B [Green Diesel]
Notes:
Green diesel is also a type of biofuel, produced by hydrocarbon oil and fat feedstock. Bio-ethers and Re-formulated gasoline are also a type of biofuels.
35. What is ELISA?
[A] Using radiolabelled second antibody
[B] Usage of RBCs
[C] Using complement-mediated cell lysis
[D] Addition of substrate that is converted into a colored end product
Show Answer
Correct Answer: D [Addition of substrate that is converted into a colored end product]
Notes:
ELISA stands for enzyme-linked immunoassay. This is a commonly used laboratory test to detect antibodies in the blood. An antibody is a protein produced by the body’s immune system when it detects harmful substances, called antigens.
36. A molecule that contains nitrogen and has the chemical properties of a base is called __
[A] RNA
[B] Nitrogenous base
[C] Bacteria
[D] Plasmid
Show Answer
Correct Answer: B [Nitrogenous base]
Notes:
A molecule that contains nitrogen and has the chemical properties of a base is called a Nitrogenous base. Nucleic acids are composed of a combination of 5 nitrogenous bases:
1. Guanine and adenine are double-ringed purine molecules.
2. Cytosine, thymine, and uracil are single-ringed pyrimidine molecules.
37. Which of the following structures are present in the throat to prevent the air passage from collapsing?
[A] Rings of cartilage
[B] Rings of muscle
[C] Rings of bone
[D] Rings of connective tissue
Show Answer
Correct Answer: A [Rings of cartilage]
Notes:
Rings of cartilage are present in the throat, specifically in the trachea or windpipe, to ensure that the air passage does not collapse. These semi-circular rings provide the necessary structural support to keep the airway open regardless of pressure changes that occur during breathing. This is very important for maintaining a clear, open path for air to flow into our lungs for respiration.
38. Chromosome designation of Turner sydrome is ____:
[A] 44A+XO
[B] 44A+XXX
[C] 44A+XXY
[D] 44A+XYY
Show Answer
Correct Answer: A [44A+XO]
Notes:
Turner syndrome is a rare chromosomal disorder characterized by partial or complete loss (monosomy) of one of the X chromosomes that affects females. Individuals with Turner syndrome have only 45 chromosomes, including just a single X chromosome. This monosomic has a chromosome complement of 44 autosomes and one X chromosome (44+XO). The abnormal condition probably originates from exceptional egg or sperm with no X chromosome.
39. Uric acid is the chief nitrogenous wastes in ____:
[A] Frogs
[B] Birds
[C] Fishes
[D] Mankind
Show Answer
Correct Answer: B [Birds]
Notes:
Land snails, insects, birds, and some reptiles excrete uric acid as the major nitrogenous waste. The white, crystalline substance seen in a typical bird or lizard “poop” is actually urine: a little pool of uric acid crystals in a very small amount of water.
40. Which vein brings clean blood from the lungs into the heart?
[A] Vena Cava
[B] Pulmonary Vein
[C] Hepatic Vein
[D] Renal Vein
Show Answer
Correct Answer: B [Pulmonary Vein]
Notes:
The pulmonary veins are a set of veins that deliver clean oxygenated blood from the lungs to the heart. It brings oxygen-rich blood to the left atrium. Systemic veins deliver deoxygenated blood to the heart.
