Cell Biology [IAS (Admin.) Mains Zoology]: Questions 1 - 9 of 62

Choose Programs:

📹 Video Course 2024 (114 Lectures [55 hrs : 21 mins]): Offline Support

Rs. 290.00 -OR-

1 Month Validity (Multiple Devices)

Preview All LecturesDetails

🎓 Study Material (887 Notes): 2024-2025 Syllabus

Rs. 850.00 -OR-

3 Year Validity (Multiple Devices)

Topic-wise Notes & SampleDetails

🎯 596 Questions (& PYQs) with Full Explanations (2024-2025 Exam)

Rs. 1050.00 -OR-

3 Year Validity (Multiple Devices)

CoverageDetailsSample Explanation

Help me Choose & Register (Watch Video) Already Subscribed?

Question 1

Appeared in Year: 2015 (IFS)

Describe in Detail Subjective▾

Describe the complexity of inner ear and its mechanism of hearing.

Edit

Explanation

Human Ear

  • Human ear is the sensory part of the body that aid in two fundamental functions: hearing and maintenance of body balance.
  • Anatomically, inner ear is the innermost part of ear in comparison to outer and middle ear. Functionally, outer ear collects the vibrations of sound from the air and extends upto the tympanic membrane, which is also know…

… (545 more words, 19 figures) …

Question 2

Appeared in Year: 2018

Describe in Detail Subjective▾

Describe the role of protein kinases in the regulation of cell cycle. Add a note on the importance of check points.

Edit

Explanation

Introduction to Protein Kinases

Protein kinases, also called PTKs are the crucial enzymes that regulate the protein activities biologically using ATP as a source of phosphate for the phosphorylation of various amino acids like serine or threonine and inducing conformational changes in inactive protein to convert it into its active format.

Cyclin and …

… (542 more words, 18 figures) …

Question 3

Appeared in Year: 2018

Describe in Detail Subjective▾

Describe the structure of plasma membrane according to the fluid mosaic model with emphasis on the role of lipid molecules in maintaining the fluidity of the membrane.

Edit

Explanation

Introduction to Cell Membrane

  • The cell membrane is also called as the plasma membrane that makes the boundary and maintain the cytoplasmic content inside one contentment.
  • The detailed structure of the plasma membrane was studied after the advent of the electron microscope in the 1950s. Till that time period, RBC human red blood cell was used to study…

… (762 more words, 19 figures) …

Question 4

Describe in Detail Subjective▾

Explain the Structural Organization and Functions of Golgi Complex.

Edit

Explanation

Introduction

  • Golgi complex is a cytoplasmic structure made up of smooth membrane cisternae, a network of tubules (vesicles and vacuoles) .
  • Golgi complex is a key featured organelle of eukaryotes which takes part in various functions like membrane transformation, secretion of proteins, lipids and important materials and aid in production of complex bi…

… (537 more words, 8 figures) …

Question 5

Describe in Detail Subjective▾

Explain the process of oogenesis. Discuss the importance of meiotic arrest during oogenesis.

Edit

Explanation

Ovaries

  • Ovaries are located in the pelvic region, on the side walls of posterior pelvic cavity.
  • It is the primary organ that produce female gamete ova (ovum) and various steroid hormones like LH- luteinizing hormone, FSH- Follicle stimulating hormone, ACTH- Adreno-Corticotropic hormone.
  • Ovaries are attached to the uterus by ovarian filaments.
  • Each ovar…

… (351 more words, 34 figures) …

Question 6

Describe in Detail Subjective▾

Describe cell cycle?

Edit

Explanation

  • Based on cellular activity the cell cycle is divided into two phases.
    • M phase (mitotic phase)
    • Inter phase.
  • In mitotic phase mitosis and cytokinesis takes place but in interphase cell growth and diverse metabolic activities takes place.
Describe Cell Cycle
  • Howard and Pelc (1953) have divided cell cycle into four distinct phases: phas…

… (179 more words, 8 figures) …

Question 7

Describe in Detail Subjective▾

What is protein targeting? Illustrate the same with reference to transport of proteins to plasma membrane.

Edit

Explanation

Introduction of Protein Targeting

  • Translation process takes place in the cell cytoplasm for the formation of protein molecules in eukaryotic cells. Few proteins for exception are to be made in the organelles like mitochondria and chloroplast. Proteins play a major role in most cellular processes but must be located properly to serve their functions.

… (524 more words, 20 figures) …

Question 8

Describe in Detail Subjective▾

What is meant by a Lampbrush chromosome? Explain its structural and functional significance.

Edit

Explanation

Lampbrush Chromosome

  • LBC (LampBrush Chromosome) is the transitory rod shaped, filamentous bodied structure that forms during the elongated period of diplotene of meiosis-I of female gametocyte cell, oocyte of birds, lower vertebrates and invertebrates, except the mammals. The name stands due to its similarity to the bottle brush.
  • They are named as gi…

… (466 more words, 6 figures) …

Question 9

Appeared in Year: 2020 (IFS)

Describe in Detail Subjective▾

What is reverse transcription? Explain it with an example. (Paper 1)

Edit

Explanation

  • Reverse transcription – It is a unique process here we require an enzyme called RNA polymerase and from the mRNA it will be translated into protein molecules. Here the name says all that the transcription process will be reversed that means from MRNA it will be producing DNA or in other words we can say that process of DNA formation by RNA is calle…

… (348 more words, 14 figures) …