Tag: coordination in human beings- chemical control

Questions Related to coordination in human beings- chemical control

Which of the following is a chemical messenger that produced in the body region but affect a different body region?

biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

  1. Hormones

  2. Enzyes

  3. Endocrines

  4. Nucleic acids

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Correct Option: A
Explanation:
A hormone is a class of molecules produced by glands in multicellular organisms, that are transported by the circulatory system to target distant organs to regulate physiology and behavior of that particular organ.
Example: Thyroxine, insulin etc

Hormones produced by the anterior pituitary that have a direct effect on the body, rather than trigger another gland, are :

biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

  1. TSH, ACTH, and gonadotropic hormones

  2. FH, LSH and progesterone

  3. GH, prolactin, and MSH

  4. testosterone and estrogen

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Correct Option: C
Explanation:

GH, prolactin and MSH are not the releasing or inhibitory factors, they have a direct effect on the body,

  • GH(growth hormone) also called as STH(somatotrophic hormone) induces the formation of IGF and sometomedian, these compounds induces the growth of bones and other organs
$GH/STH \overset{Induce}\rightarrow IGF+ Sometomedian\rightarrow growth$
  • Prolactin also called as lactotrophic hormones induces-
  1. Growth of mammary glands
  2. Synthesis of milk
  3. synthesis of antigonadotrophin
  • MSH(melanocyte stimulating hormone) is secreted from adenohypophysis and induce metachrosis( changing of color in amphibians).

GH promotes :

biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

  1. bone growth

  2. cell division

  3. protein synthesis

  4. all of the above

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Correct Option: D
Explanation:

Growth hormone is a 191-amino acid, single-chain polypeptide that is synthesized, stored and secreted by somatotropic cells within the lateral wings of the anterior pituitary gland. GH is a stress hormone that raises the concentration of glucose and free fatty acids.growth hormone promotes the growth of bones, muscles and various other organs, too much of it causes abnormal growth of all these tissues, a condition that is referred to as gigantism when it applies to children and acromegaly when it applies to adults. It synthesizes protein also.

Hormones are substances that fall into two basic categories:

biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

  1. stimulator hormones and receptor hormones

  2. male hormones and female hormones

  3. non-steroid (peptide) hormones and steroid hormones

  4. inter-organ and inter-organismic

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Correct Option: C
Explanation:

Hormones are a substance that falls into two basic categories which are non-steroid (peptide, insulin) hormones and steroid hormones (adrenaline, testosterone).

Nongenetic RNA is of

biology control and coordination in living organisms enzymes and hormones hormones coordination in human beings- chemical control

  1. Two types

  2. Three types

  3. Four types

  4. One type

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Correct Option: B
Explanation:

There are 3 types of non genetic RNA's 

  1. mRNA = messenger RNA
  2. tRNA = transfer RNA
  3. rRNA = ribosomal RNA
Correct option B

The metals present in insulin and haemoglobin are respectively:

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. $Zn, \ Hg$

  2. $Zn,\ Fe$

  3. $Co,\ Fe$

  4. $Mg,\ Fe$

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Correct Option: B
Explanation:
Insulin contains zinc and haemoglobin contains Fe. (Iron)

Hence, option B is correct.

Which of following hormone is produced by testis?

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. Progesterone

  2. Estradiol

  3. Testosterone

  4. estrone

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Correct Option: C
Explanation:

Testosterone is produced by testes. Testosterone, which is produced in the body by the male testes, influences men physically, emotionally and sexually. It is called the "king of hormones", testosterone is certainly the most important hormone when it comes to sexual characteristics in men.

Androgens are

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. female sex hormone

  2. non steriod

  3. plant hormone

  4. male sex hormones

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Correct Option: D
Explanation:

Androgens are male sex hormones. The main androgen is testosterone, and an additional androgen is dihydrotestosterone. Testosterone is secreted mainly by the testes, but also a little bit by the adrenal cortex. In some tissues, testosterone is chemically changed into dihydrotestosterone in order to have an effect.

Which of the following is a steroid?

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. Insulin

  2. Vitamins

  3. Cytokinins

  4. Estrogen

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Correct Option: D
Explanation:

Estrogen is a steroid. Estrogens are a group of steroid hormones that control the development and maintenance of an individual's feminine characteristics. Natural estrogens exist in men as well as women, and are found in higher amounts in women, especially in those of reproductive age.

Which bond angle $\theta $ gives maximum dipole moments for triatomic molecule $XY _{ 2 }$ :-

chemistry biomolecules enzymes and hormones hormones coordination in human beings- chemical control

  1. $\theta \quad =\quad 90^{ \circ }$

  2. $\theta \quad =\quad 120^{ \circ }$

  3. $\theta \quad =\quad 180^{ \circ }$

  4. Both 2 and 3

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Correct Option: B