31. The adrenal cortex secretes all except __
[A] Androgenic steroid
[B] Cortisol
[C] Relaxin
[D] Aldosterone
Show Answer
Correct Answer: C [Relaxin]
Notes:
The adrenal cortex secretes all except Relaxin. Relaxin is produced primarily by the corpus luteum.
32. Which of the following conditions aggravate fungal diseases?
[A] Heat and moisture
[B] Cold and dry
[C] Humid and Cold
[D] Scorching heat
Show Answer
Correct Answer: A [Heat and moisture]
Notes:
Heat and moisture conditions aggravate fungal diseases. Fungal diseases are also known as mycosis.
33. The bioethanol is subjected to rectification to remove?
[A] Sugar
[B] Enzymes
[C] Yeast
[D] Impurities
Show Answer
Correct Answer: D [Impurities]
Notes:
The bioethanol is subjected to rectification to Remove Impurities. Alcohol is made by microbial fermentation, mostly from carbohydrates produced in sugar- or starchy plants such as corn, sugarcane, sweet sorghum, or lignocellulosic biomass known as bioethanol.
34. The best milch breed in the word is ____:
[A] Chittagong
[B] Holstein-Friesian
[C] Deoni
[D] Sindhi
Show Answer
Correct Answer: B [Holstein-Friesian]
Notes:
Holstein Friesian cows are world’s highest-production dairy animals and dominate the global dairy industry. These cows originated in Dutch provinces of North Holland and Friesland, and Schleswig-Holstein in Northern Germany. They are known as Holsteins in North America and Friesians in UK and Ireland.
35. 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.
36. The number of chambers in a human heart is
____:
[A] Two
[B] Three
[C] Four
[D] Five
Show Answer
Correct Answer: C [Four]
Notes:
The human heart has four chambers, two superior atria and two inferior ventricles. The atria are the receiving chambers and the ventricles are the discharging chambers. The pathway of blood through the human heart consists of a pulmonary circuit and a systemic circuit.
37. Which among the following constitutes the central nervous system in human body?
[A] Only brain
[B] Only blood
[C] Only spinal cord
[D] Both brain and spinal cord
Show Answer
Correct Answer: D [Both brain and spinal cord]
Notes:
The central nervous system (CNS) controls most functions of the body and mind. It consists of two parts: the brain and the spinal cord. Both the brain and spinal cord are protected by a three-layered covering of connective tissuecalled the meninges.
38. Where does internal fertilization typically occur?
[A] Inside the female body
[B] Outside the female body
[C] Inside the male body
[D] Outside the male body
Show Answer
Correct Answer: A [Inside the female body]
Notes:
Internal fertilization is a mode of reproduction wherein the fusion of male and female gametes (sperm and egg) occurs inside the female body. It’s a common method in terrestrial animals due to the higher survival rate of fertilized eggs within a protected internal environment. Contrastingly, external fertilization takes place outside the female body, often in aquatic environments.
39. Cinnamon is obtained from which part of the plant?
[A] Bark
[B] Stem
[C] Fruits
[D] Roots
Show Answer
Correct Answer: A [Bark]
Notes:
Cinnamon is a spice obtained from the inner bark of several tree species from the genus Cinnamomum. Cinnamon is used mainly as an aromatic condiment and flavoring additive in a wide variety of cuisines. The aroma and flavor of cinnamon derive from its essential oil and principal component, cinnamaldehyde, as well as numerous other constituents, including eugenol.
40. The red, orange and yellow colours of leaf is due to ____:
[A] Aldehydes
[B] Tannis
[C] Carotenoid
[D] Lignins
Show Answer
Correct Answer: C [Carotenoid]
Notes:
The red, orange and yellow colours of leaf are due to carotenoids contained in chromoplasts. When the green chlorophyll in leaves diminishes, the yellow pigments that already exist become dominant and give their color to the leaves.
