Tag: zoology

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Questions Related to zoology

Multiple choice zoology endocrine system and chemical co-ordination hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Somatostatin is produced by

  1. Adenohypophysis

  2. Neurohypophysis

  3. Pineal gland

  4. Basal part of diencephalon and Pancreas
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation
Somatostatin is known as growth hormone-releasing inhibiting hormone. It inhibits the release of growth hormone from pituitary gland. Growth hormone stimulates body growth. Somatostatin is secreted from hypothalamus which represents basal part of diencephalon in forebrain. It inhibits the secretion of other pancreatic hormones such as insulin and glucagon.
So, the correct answer is 'Basal part of diencephalon'.
Multiple choice zoology endocrine system and chemical co-ordination hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

What is the effect of GnRH produced by hypothalamus?

  1. Stimulates the synthesis and secretion of androgens

  2. Stimulates secretion of milk in mammary glands

  3. Stimulates fetal ejection reflex

  4. Stimulates synthesis of carbohydrates from non-carbohydrates in liver
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Gonadotropin releasing hormone(GnRH), stimulates the anterior lobe of pituitary gland(adenohypophysis) to secrete two gonadotropins, FSH and LH. In males LH stimulates the Leydig's cells of the testis to secrete androgens.

Multiple choice zoology endocrine system and chemical co-ordination hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

During danger, emotional or during struggle etc., secretion of which hormone increases ____________.

  1. Vasopressin

  2. Oxytocin

  3. Abscissic acid

  4. Ethylene
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Vasopressin (ADH) levels often increase during stress or danger to help maintain blood pressure and fluid balance. Options C and D are plant hormones, and Oxytocin is primarily associated with childbirth and social bonding.

Multiple choice zoology endocrine system and chemical co-ordination hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Choose the correct answer from the alternatives given.
Gonadotropin releasing hormone is secreted by:

  1. pituitary

  2. hypothalamus

  3. cerebellum

  4. gonads
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation
GH- RH ( Gonadotropic releasing hormone ) secretes growth hormone (GH). GH or STH (Growth or Somatotropin Hormone) stimulates body growth, protein, fat, and carbohydrate metabolism. The hormone is secreted by adenohypophysis (anterior pituitary). Hypersecretion of this hormone during the period of skeletal growth causes gigantism characterized by excessive growth of bones, with the enlargement of internal organs as well. Hypersecretion in adulthood causes acromegaly. Here the bones become abnormally thick due to ossification of periosteum and thickening of soft tissues as well. 
So the correct answer is hypothalamus.
Multiple choice zoology endocrine system and chemical co-ordination hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Match column I with column II and select the correct option from the codes given.

Column I Column II
A. Thyroid (i) Acts on the renal tubules
B. Adrenal (ii) Regulates blood calcium level
C. Pituitary (iii) Maintains diurnal rhythm of our body
D. Pineal (iv) Acts on the meloncytes

  1. A-(iv), B-(iii), C-(ii), D-(i)

  2. A-(iii), B-(iv), C-(i), D-(ii)

  3. A-(iv), B-(ii), C-(iii), D-(i)

  4. A-(ii), B-(i), C-(iv), D-(iii)
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The thyroid gland is composed of stromal cells which release TCT (Thyrocalcitonin ) which regulates the calcium level in the body, Adrenal gland releases aldosterone which acts on renal tubules, Pituitary gland releases MSH which act on melanocytes, Pineal gland acts as a biological clock of body and maintains the diurnal rhythm of our body. So the correct option is ' A-(ii), B-(i), C-(iv), D-(iii)'

Multiple choice zoology endocrine system and chemical co-ordination hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Thermoregulatory centre or thermostat in the body of homeothermal animals and man is found in

  1. Skin

  2. Diencephalon

  3. Hypothalamus

  4. Pituitary
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

The hypothalamus of the diencephalon present in the forebrain is called the thermostat of the body because it is responsible for maintaining the temperature of the body through the mechanism of the homeostasis. 

A. Skin acts as a ventilator for perspiration.
B. Diencephalon is a big region, in which hypothalamus is present.
C. Hypothalamus is the thermostat of the body.
D. The pituitary gland is associated with the hypothalamus to perform chemical coordination via hormones.
Hence, the correct answer is 'Hypothalamus'

Multiple choice zoology endocrine system and chemical co-ordination hypothalamus nervous and endocrine system in humans coordination in human beings- chemical control

Match column I with column II and select the correct option from the given.

Column I Column II
A. Hypothalamus (i) Relaxin
B. Anterior pituitary (ii) Progesterone
C. Testis (iii) FSH and LH
D. Ovary (iv) Androgen
(v) Gonadotropin releasing hormone

  1. A-(v), B-(iii), C-(iv), D-(ii)

  2. A-(v), B-(iii), C-(ii), D-(iv)

  3. A-(i), B-(ii), C-(iv), D-(iii)

  4. A-(iii), B-(v), C-(iv), D-(ii)
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

A. Hypothalamus: It is located in the base of the diencephalon. It releases releasor hormone(stimulate anterior pituitary) and inhibiting hormone( inhibit anterior pituitary). So, hypothalamus stimulates gonadotrophin-releasing hormone.

B. Anterior pituitary: It stimulates FSH and LH whose function is to stimulate spermatogenesis in male and growth of ovarian follicle in the female.
C. Testis: It secretes androgen in males such as testosterone whose function develops male reproductive organs and accessory sexual characters.
D. Ovary: It stimulates estrogen and progesterone. Progesterone stops egg production, attaches foetus to the uterine wall.
So, the correct answer is 'A- v, B-iii, C-iv, D-ii'.

Multiple choice zoology applications of biotechnology biotechnological regulations pcr asexual modes of reproduction

What does G.M.O stand for?

  1. Genetically Modified Organism

  2. Growth Maturity Order

  3. Good Maturing Offspring

  4. Gold Medal Order
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

GMO stands for Genetically modified organisms. Any organism whose genetic material is modified by the use of genetic engineering technique is known as genetically modified organism. It is basically used to produce biotechnological products for the benefit of mankind.

So, the correct answer is option A.

Multiple choice zoology applications of biotechnology biotechnological regulations pcr asexual modes of reproduction

A genetically manipulated organism containing in its genome one or more inserted gene of another species is called as

  1. Transposon

  2. Gene expression

  3. Transgenic organism

  4. Retroposons
Reveal answer Fill a bubble to check yourself
C Correct answer
Explanation

Transposons are movable DNA sequences that can move (or jump) from one location in the genome to another and are found in bacteria. They leave a copy of themselves in the original position when they move to a new site. This phenomenon is significant  in antibiotic resistance. 

Retroposons are variants of transposons that move via an intermediate RNA form. They transcribe DNA element into RNA which is then reverse transcribed into DNA. This newly formed cDNA is inserted at a new site in the genome. The process of synthesis of a functional gene product using the information from a gene is gene expression. Functional product of protein coding genes is protein, but non-protein coding genes code for as transfer RNA (tRNA) or small nuclear RNA (snRNA) genes. 
Organisms carrying one/more gene or genes from a different species/organism is a transgenic. They are produced to impart advantageous traits which were not there in them.