31. What is the function of the vena cava in the excretory system?
[A] form a network between the arteries to veins
[B] return deoxygenated blood from the body and the head to the heart
[C] Both 1 and 2
[D] None of these
Show Answer
Correct Answer: B [return deoxygenated blood from the body and the head to the heart]
Notes:
The vena cava returns deoxygenated blood from the body and head to the heart.
32. The branch of biology that studies the immune system in all organisms.
[A] Botany
[B] Microbiology
[C] Immunology
[D] Biotechnology
Show Answer
Correct Answer: C [Immunology]
Notes:
Immunology is a branch of biology that studies the immune system in all organisms.
33. The nutritive medium for the ejaculated sperms is given by which of the following?
[A] fallopian tube
[B] vaginal fluid
[C] seminal fluid
[D] uterine lining
Show Answer
Correct Answer: C [seminal fluid]
Notes:
The nutrient medium for ejaculated spermatozoa is provided by seminal fluid.
34. Which of the following is called the end part of the oviduct?
[A] isthmus
[B] ampulla
[C] ostium
[D] thalamus
Show Answer
Correct Answer: A [isthmus]
Notes:
Isthmus is called the end part of the oviduct. It is a narrow strip of land that connects two larger landmasses and separates two bodies of water.
35. Which of the following is an oncogenic trait?
[A] a type of trait whose phenotype is influenced by more than one gene
[B] a trait produced by the effect of a gene or an allele.
[C] a gene that has the potential to cause cancer.
[D] None of these
Show Answer
Correct Answer: C [a gene that has the potential to cause cancer.]
Notes:
A gene that has the potential to cause cancer is called an oncogenic trait.
36. A renewable, biodegradable fuel that is manufactured from vegetable oils and animal fats are called __
[A] Bioethanol
[B] Biomethane
[C] Biodiesel
[D] None of these
Show Answer
Correct Answer: C [Biodiesel ]
Notes:
A renewable, biodegradable fuel that is manufactured from vegetable oils and animal fats are called Biodiesel
37. Which of the following is an important objective of biotechnology in the field of agriculture?
[A] to decrease seed number
[B] to produce pest-resistant varieties of plants
[C] to increase phosphorous, nitrogen production
[D] to reduce the number of plants
Show Answer
Correct Answer: B [to produce pest-resistant varieties of plants]
Notes:
An important objective of biotechnology in the field of agriculture is to produce pest-resistant varieties of plants.
38. Some strains of Bacillus thuringiensis can kill certain insects such as __.
[A] Lepidoptera
[B] scorpion
[C] fruit fly
[D] dragonfly
Show Answer
Correct Answer: A [Lepidoptera]
Notes:
Some strains of Bacillus thuringiensis can kill certain insects such as Lepidoptera. They are an order of insects consisting of moths and butterflies.
39. Which transgenic tomato variety has a better shelf life?
[A] Lyco 100
[B] PHB tomato
[C] Bt tomato
[D] Flavr savr
Show Answer
Correct Answer: D [Flavr savr]
Notes:
Flavr savr is a transgenic tomato variety that has a better shelf life and was the first GM food crop to be used commercially.
40. Which of the following are examples of hydrophilic molecules?
[A] sugar
[B] cellulose
[C] starch
[D] All of the above
Show Answer
Correct Answer: D [All of the above]
Notes:
A molecule whose interaction with water and other polar substances is more thermodynamically favorable than its interaction with oil or other hydrophobic solvents is called a hydrophilic molecule. Sugar, salt, starch, and cellulose are examples of hydrophilic molecules.
