Home
Class 12
BIOLOGY
What are those structures that appear as...

What are those structures that appear as ‘beads-on-string’ in the chromosomes when viewed under electron microscope?

A

Nucleotides

B

Nucleosomes

C

Base pairs

D

Genes

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • MICROBES IN HUMAN WELFARE

    SARAS PUBLICATION|Exercise EXERCISE|19 Videos

  • MODEL QUESTION PAPER 1

    SARAS PUBLICATION|Exercise EXERCISE|90 Videos

Similar Questions

Explore conceptually related problems

On what principle is an electron microscope based ?

What causes structural chromosomal aberration occur?

A scientist was studying the production of a protein that was released by an animal cell into a culture medium, she found that the protein only appeared in the culture medium after the added a few drops of a hormone to the cell. Before adding the hormone, she labelled the protein inside the cell with a fluorescent dye and looked at the cell under the lgiht microscope. The dye was seen in flattened sheets and tube. like structures throughout the cell, and in stacks of flattened sac-like structures. after adding the hormone, the dye was aslo seen as small dots clustered against the cell membrane, Which statement most likely explains these observations?

A currrent I is passed through a silver strip of width d and area of cross section A. The number of free electrons per unit volume is n. (a) Find the drift velocity v of the electrons. (b) If a magnetic field B exists in the region as shown in what is the average magnetic force on the free electrons? (c) Due to the magnetic force, the free electrons get accumulated on one side of the conductor along its length. This produces a transverse electric field in the conductor which opposes the magnetic force on the electrons. Find the magnitude of the electric field which will be the potential diference developed across the width of the conductor due to the electron- accumulation? The appearance of a transverse emf, when a current-carrying wire is placed in a magnetic field, is called hall effect.

The cross - section of a plant material shown the following features on viewing under the microscope. (a) Radically arranged vascular bundles. (b) Four xylem arms with protoxylem facing outer side. To which organ should it be arranged.

The cross-section of a plant material shown the following features on viewing under the microscope. (a) Radially arranged Vascular bundles (b) Xylem is exarch and polyarch (c ) Metaxylem is polygonal in shape. Identify the slide.

A small telescope has an objective lens of focal length 125 cm and an eyepiece of focal length 2 cm. What is the magnification of the telescope? What is the separation between the objective and eyepiece? Two stars separated by 1' will appear at what separation when viewed through the telescope?