Sindh Zoology 2019 — Solved MCQs

Question 1

Anticonvulsant drugs are administered in:

Accepted Answer

B. Epilepsy — Anticonvulsant drugs are primarily administered in epilepsy to prevent or control seizures.

Question 2

This diseases is caused due to deficiency of insulin:

Accepted Answer

B. Diabetes — Diabetes is a metabolic disorder characterized by high blood sugar levels due to either insufficient insulin production or the body's inability to respond effectively to insulin. Insulin deficiency, particularly in type 1 diabetes, leads to uncontrolled glucose levels, causing various complications such as cardiovascular disease, kidney failure, and nerve damage.

Question 3

The unit of measurement of noise is:

Accepted Answer

B. Decibel — It's a logarithmic unit used to express the ratio between two values of a physical quantity, often power or intensity. In the context of sound, it measures the intensity of sound relative to a reference level, typically the threshold of human hearing.

Question 4

Lamark’s theory does not include this point:

Accepted Answer

A. Natural selection — This concept was not part of Lamarck's theory but is central to Charles Darwin's theory of evolution. Natural selection involves the differential survival and reproduction of individuals due to differences in traits. Over time, this process leads to the accumulation of favorable traits in a population.

Question 5

This disease is controlled by gene therapy:

Accepted Answer

A. Cystic Fibrosis — Gene therapy aims to address the defective gene responsible for cystic fibrosis by delivering a functional copy of the gene into the patient's cells, particularly those affected by the disease, such as lung cells. This approach can potentially improve the function of the cells and alleviate symptoms associated with cystic fibrosis.

Question 6

This joint between two consecutive vertebrae in human beings is:

Accepted Answer

C. Gliding — Gliding joint is also called the plane join. It only permits limited movement like bending and slipping one bone over to another, for example, wrist and vertebral column.

Question 7

Overproduction of cortisol causes:

Accepted Answer

B. Cushing’s syndrome — This syndrome results from prolonged exposure to high levels of cortisol. It can be caused by various factors, such as the overuse of corticosteroid medications or the presence of a tumor that produces cortisol. Symptoms include weight gain, high blood pressure, and muscle weakness.

Question 8

This is progressive deterioration of the body:

Accepted Answer

C. Aging — Aging refers to the process of natural, gradual and irreversible changes that occur in living organisms over time, resulting in a decline in their physical and mental abilities. It is a biological phenomenon that affects all living organisms and is characterized by a progressive deterioration of physiological functions that eventually leads to death. The aging process is influenced by various factors such as genetics, environmental factors, lifestyle, and disease, and it varies from person to person.

Question 9

Struggle for existence among the members of same species is:

Accepted Answer

C. Intraspecific struggle — This refers to the competition or conflict for resources among individuals of the same species. Intraspecific struggle is a fundamental aspect of population ecology and evolutionary biology. It includes competition for food, mates, territory, and other resources essential for survival and reproduction. Intraspecific struggle can lead to natural selection favoring individuals with traits that enhance their competitive abilities within the same species.

Question 10

Deficiency of Vitamin D causes:

Accepted Answer

C. R﻿ickets — Rickets is indeed caused by a deficiency in vitamin D. Vitamin D is necessary for the absorption of calcium and phosphorus from the intestines, which are essential for bone mineralization. Without sufficient vitamin D, bones become soft, weak, and prone to deformities, leading to conditions like rickets, especially in children.

Question 11

This reproduction avoids genetic monotony:

Accepted Answer

D. Sexual reproduction — Sexual reproduction involves the fusion of gametes (sex cells) from two parents to produce offspring with genetic variation. This variation helps prevent genetic monotony and allows for adaptation to changing environments. It's common in many animals, plants, fungi, and some protists.

Question 12

The non-coding sequence of DNA is:

Accepted Answer

A. Intron — In molecular biology, an intron is a segment of DNA or RNA molecule that does not code for proteins and interrupts the sequence of genes. During gene expression, introns are transcribed into pre-mRNA but are ultimately removed by RNA splicing before the mature mRNA is translated into a protein.

Question 13

Hypoblast lines the:

Accepted Answer

A. Gastrocoel — In embryology, the gastrocoel refers to the cavity formed during gastrulation in the developing embryo. The hypoblast, also known as endoderm, lines the gastrocoel. It plays a crucial role in the development of digestive and respiratory organs.

Question 14

The excretory organs of cockroach are:

Accepted Answer

A. Malpighian tubules — These are the primary excretory organs in insects, including cockroaches. They are long, thread-like tubules located in the abdominal cavity. Malpighian tubules filter waste products, such as nitrogenous compounds, ions, and water, from the hemolymph (insect blood). These waste products are then excreted as uric acid, which helps conserve water in arid environments.

Question 15

The Animal excretes:

Accepted Answer

A. Urea — Urea is a waste product formed in the liver when proteins are metabolized. It's less toxic than ammonia and is excreted by mammals, including humans, through urine.

Question 16

These are cells of hard bones:

Accepted Answer

A. Osteocytes — These are the most abundant cells in mature bone tissue and are responsible for maintaining bone structure and mineral homeostasis.

Question 17

Physical trauma in the vertebrae of humans results in:

Accepted Answer

D. Disc slip — Disc slip, also known as a herniated or slipped disc, occurs when the soft inner core of an intervertebral disc protrudes through the tough outer layer and presses on nearby nerves or the spinal cord. Physical trauma to the vertebrae can indeed contribute to the development of a herniated disc by causing damage to the disc's structure.

Question 18

This is not a sexually transmitted disease:

Accepted Answer

C. Tetanus — Tetanus is not a sexually transmitted disease. It is caused by the bacterium Clostridium tetani, which enters the body through wounds or cuts contaminated with the bacteria's spores. It is commonly associated with puncture wounds, such as those from rusty nails, and is not transmitted through sexual contact.

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