Tag: bio-chemistry

Quizzes (82) Questions (1918)

Questions Related to bio-chemistry

Multiple choice bio-chemistry digestion digestive glands liver pancreas

Sacculus rotundus is a dilated part as posterior end of

  1. Ileum

  2. Oesophagus

  3. Ilium

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

  • An anatomic structure exclusive to rabbits that are located at the terminal part of the ileum is sacculus rotundus. 
  • It is formed at the distal end of ileum and is expanded to form a small dilated spherical sac in a rabbit.
  •  It is rich in lymphoid tissue. Hence, Sacculus rotundus is a dilated part as posterior end of the ileum.
So, the correct answer is 'ileum'.

Multiple choice bio-chemistry digestion digestive glands liver pancreas

Crypts in between the bases of villi in the intestine are crypts of Lieberkuhn. Which of the following cells in these crypts secrete digestive enzymes?

  1. Pariental cells

  2. Paneth cells

  3. Zymogen cells

  4. Argentaffin cells
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation


Crypts are anatomical structures that are narrow but deep invaginations into a larger structure. One common type of anatomical crypt is the Crypts of Lieberkühn. Crypts of Lieberkuhn between the bases of villi in the intestine have the Paneth cells which secrete digestive enzymes.

So, the correct option is 'paneth cells'.

Multiple choice bio-chemistry digestion digestive glands liver pancreas

A carbohydrate splitting enzyme is secreted by 

  1. Liver

  2. Zymogen cells of gastric glands

  3. Spleen

  4. Crypts of Lieberkuhn
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

While the chyme is present within the small intestine, glands within this structure begin to secrete different types of digestive enzymes, called carbohydrases (amylase, proteases, and lipases or fat splitting enzymes). The glands responsible for these enzymatic secretions are found in the mucosal layer of the small intestine, called the crypts of Lieberkuhn.

Multiple choice bio-chemistry digestion digestive glands liver pancreas

Crypts of lieberkuhn are present in

  1. Intestine

  2. Stomach

  3. Oesophagus

  4. All of the above
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

An intestinal gland (crypts of Lieberkuhn) is a gland found in the epithelial lining of the small intestine and colon. The glands are named after German anatomist J. N. Lieberkuhn.

Multiple choice bio-chemistry digestion digestive glands liver pancreas

Crypts of Lieber kuhn are present in ___________.

  1. Intestine

  2. Stomach

  3. Oesophagus

  4. All of these
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

Crypts of Lieberkuhn are tubular glands found in the intestinal mucosa, specifically between the villi in the small intestine.

Multiple choice bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit

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

Column - I Column - II
A. Leeuwenhoek (i) First saw and described a living cell
B. Robert Brown (ii) Presence of cell wall is unique to plant cells
C. Schleiden (iii) Discovered the nucleus
D. Schwann (iv) All plants are composed of different kinds of cell
  1. $A - (i), B - (iii), C - (iv), D - (ii)$
  2. $A - (i), B - (iii), C - (ii), D - (iv)$
  3. $A - (iii), B - (i), C - (iv), D - (ii)$
  4. $A - (i), B - (iv), C - (ii), D - (iii)$
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation
  • The first man to witness a live cell under a microscope was Anton Von Leeuwenhoek.
  • Robert Brown was responsible for discovering the nucleus of a cell.
  • Matthias Jakob Schleiden started that all parts of the plant organism are composed of different kinds of cell.
  • Theodor Schwann studied that cells had a thin outer layer which is today known as plasma membrane. He also concluded that the plant shows the presence of a cell wall is a unique character of plant cells.
  • So, the correct option is " A-(i), B-(iii), C-(iv), D-(ii).
Multiple choice bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit
The figures of cork cells as seen by Robert Hooke were published in the book.

  1. Origin of species

  2. Species plantarum

  3. Genera plantarum

  4. Micrographia
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

In 1665 Robert Hooke published his book Micrographia which detailed his observations and included drawings. This book was the first important work on microscopy, the study of objects through a microscope. At the end of the book, there are observations of the stars and moon as seen through a telescope.

So, the correct answer is " Micrographia ".

Multiple choice bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit
Unicellular microscopic organisms were first studied by _____________.

  1. Robert Hooke

  2. Priestley

  3. Pasteur

  4. Leeuwenhoek
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Leeuwenhoek, a Dutch naturalist was the first to observe and describe various unicellular microorganisms like bacteria, protozoa etc. along with animal cells like RBCs, muscles fibres, through a specialized lens designed by him.

So, the correct answer is 'Leeuwenhoek'

Multiple choice bio-chemistry cell-the basic unit of life introduction to cell discovery and cell theory cell discovery cell discovery and cell theory cell as structural and functional unit
Omnis cellula e cellulae i.e., new cells arise from pre-existing cells, this statement was given by

  1. Schleiden and Schwann

  2. Rudolf Virchow

  3. Robert Brown

  4. Robert Hooke
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Rudolf Virchow modified the cell theory and gave the concept of 'omnis cellula e cellulae' - means new cells develop by division of the pre-existing cells. This is called theory of cell lineage or common ancestry.

So, the correct answer is 'Rudolf Virchow'.