31. The three major types of muscles in the body are:
[A] Smooth muscle, sports muscles, and skeletal muscles
[B] Smooth muscle, cardiac muscle, and skeletal muscle
[C] Smooth muscle, running muscle, and face muscles
[D] Smooth muscle, flexible muscle, and strength muscle
Show Answer
Correct Answer: B [Smooth muscle, cardiac muscle, and skeletal muscle]
Notes:
The three major types of muscles in the body are Smooth muscle, cardiac muscle, and skeletal muscle
32. Which of the following is located at the junction with the bladder composed of smooth involuntary muscle?
[A] Urethra
[B] Internal Urethral sphincters
[C] External Urethral Sphincters
[D] Bladder
Show Answer
Correct Answer: B [Internal Urethral sphincters]
Notes:
The internal urethral sphincter is a muscle that constricts the internal urethral orifice. It is made up of smooth muscle so it is involuntary.
33. Which of the following vitamins is stored in the liver?
[A] Vitamin K
[B] Vitamin D
[C] Vitamin E
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Vitamin K, D, and E are stored in the liver. The liver is the chemical “factory” of the body.
34. The ovary is surrounded by a thin covering of ___.
[A] epithelium
[B] ampulla
[C] isthmus
[D] infundibulum
Show Answer
Correct Answer: A [epithelium]
Notes:
The ovary is surrounded by a thin covering of epithelium, surrounds the ovarian stroma, and is divided into two regions – the outer cortex and the inner medulla.
35. Which of the following diseases is caused by protozoa?
[A] Whooping cough
[B] Amoebic dysentery
[C] Measles
[D] Athlete’s foot
Show Answer
Correct Answer: B [Amoebic dysentery]
Notes:
Amoebic dysentery diseases are caused by the protozoan parasite Entamoeba histolytica.
36. Which of the following are applications of rDNA technology?
[A] Development of Transgenic Plants
[B] Production of Antibiotics
[C] Production of Hormone Insulin
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
Applications of rDNA technology are:
1. Development of Transgenic Plants
2. Production of Antibiotics
3. Production of Hormone Insulin
4. Production of Vaccines
5. Production of Interferon
37. A cross between homozygous recessive and heterozygous plant is
____:
[A] Back cross
[B] Test cross
[C] Monohybrid cross
[D] Dihybrid cross
Show Answer
Correct Answer: B [Test cross]
Notes:
A cross between a homozygous plant with recessive traits and a heterozygous plant is known as a test cross. A test cross is a valuable tool in predicting the genotype of the organism in question. In its simplest form, a test cross is an experimental cross of an individual organism of dominant phenotype but unknown genotype and an organism with a homozygous recessive genotype (and phenotype). Test cross is done to determine the genotype of an F2 generation plant, showing dominant characteristics. In the test cross, an F2 plant that shows the dominant trait is crossed with the homozygous recessive.
38. Which of the following cell organells are present only in plant cell?
[A] Lysosomes
[B] Plastids
[C] Mitochondria
[D] Cell membrane
Show Answer
Correct Answer: B [Plastids]
Notes:
The plastid is a major double-membrane organelle found in the cells of plants. Plastids are the site of manufacture and storage of important chemical compounds used by the cell. Plastids often contain pigments used in photosynthesis, and the types of pigments present can change or determine the cell’s colour.
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. Cuscuta is a ____:
[A] Complete stem parasite
[B] Partial root parasite
[C] Partial stem parasite
[D] Complete root parasite
Show Answer
Correct Answer: A [Complete stem parasite]
Notes:
Cuscuta (Dodder) is a genus of about 100-170 species of yellow, orange or red (rarely green) parasitic plants. Dodders are supremely adapted for a life of plunder and pillage. Reduced in form to scrambling and twining threads, they appear to be completely leafless, although closer inspection reveals tiny scale leaves pressed close to the stems. So, it is a stem parasite.
