A are granular structures first observed under electron microscope as dense particles by …B… (1953). Here, A and B refer to
A-Ribosomes; B-Perner
A-Lysosomes; B-de Duve
A-Peroxisomes; B-Flemming
A-Ribosomes; B-George Palade
A-Ribosomes; B-Perner
A-Lysosomes; B-de Duve
A-Peroxisomes; B-Flemming
A-Ribosomes; B-George Palade
Answer:The correct answer is: A-Ribosomes; B-George Palade
J D Watson and F H C Crick (1953) showed that DNA has a double helical structure with two polynucleotide chains connected by hydrogen bonds and running in opposite directions (antiparallel). The antiparallel strands of a DNA molecule means that the phosphate groups at the start of two DNA strands are in opposite position (pole).
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Middle lamella is present
(i) Staining with weak alkaline solution of crystal violet
(ii) Treatment with 0.5% iodine solution
(iii) Washing with water
(iv) Treatment with absolute alcohol/acetone
Middle lamella is present
(i) Staining with weak alkaline solution of crystal violet
(ii) Treatment with 0.5% iodine solution
(iii) Washing with water
(iv) Treatment with absolute alcohol/acetone
Number of protofilament in microtubule is
Number of protofilament in microtubule is
Ribosomes that occur exclusively in mitochondria is
Ribosomes that occur exclusively in mitochondria is
Rough endoplasmic reticulum differs from smooth walled endoplasmic reticulum due to the presence of
Rough endoplasmic reticulum differs from smooth walled endoplasmic reticulum due to the presence of
A widely accepted, improved model of cell membrane is
Glycolipids are lipids with attached carbohydrate, which acts as recognition sites during cell-cell interaction, as well as sites of attachment in a tissue
Glycoproteins are often integral membrane proteins and are also important for cell recognition
A widely accepted, improved model of cell membrane is
Glycolipids are lipids with attached carbohydrate, which acts as recognition sites during cell-cell interaction, as well as sites of attachment in a tissue
Glycoproteins are often integral membrane proteins and are also important for cell recognition
Organelle important in spindle formation during nuclear division is
Organelle important in spindle formation during nuclear division is
Identify A to F in the sectional view of a chloroplast showing the different parts

Identify A to F in the sectional view of a chloroplast showing the different parts

Consider the following statements and choose the correct one
Consider the following statements and choose the correct one
The backbone of RNA consists of which of the following sugar?
The backbone of RNA consists of which of the following sugar?
A
shaped object with dimension shown in the figure, is lying on a smooth floor. A force
is applied at the point
parallel to
, such that the object has only the translational motion without rotation. Find the location of
with respect to
.

Let mass of rod
Let
Taking point
and
Position vector of centre of mass of the system
A
shaped object with dimension shown in the figure, is lying on a smooth floor. A force
is applied at the point
parallel to
, such that the object has only the translational motion without rotation. Find the location of
with respect to
.

Let mass of rod
Let
Taking point
and
Position vector of centre of mass of the system
Two balls each of mass
are placed on the vertices
and
of an equilateral triangle
of side 1m. A ball of mass 2
is placed at vertex
. The centre of mass of this system from vertex
(located at origin) is


Two balls each of mass
are placed on the vertices
and
of an equilateral triangle
of side 1m. A ball of mass 2
is placed at vertex
. The centre of mass of this system from vertex
(located at origin) is


The instantaneous velocity of a point
of the given rod of length 0.5 m is 3
in the represented direction. The angular velocity of the rod for minimum velocity of end A is

The instantaneous velocity of a point
of the given rod of length 0.5 m is 3
in the represented direction. The angular velocity of the rod for minimum velocity of end A is

Three identical spheres, each of mass 1 kg are kept as shown in figure below, touching each other, with their centers on a straight line. If their centres are marked
,
,
respectively, the distance of centre of mass of the system from
is

Distance of centre of mass from
Three identical spheres, each of mass 1 kg are kept as shown in figure below, touching each other, with their centers on a straight line. If their centres are marked
,
,
respectively, the distance of centre of mass of the system from
is

Distance of centre of mass from
From a circular disc of radius
and mass 9
, a small disc of radius
/3 is removed from the disc. The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through
is

or
Here,
Substituting in Eq. (i), we have
From a circular disc of radius
and mass 9
, a small disc of radius
/3 is removed from the disc. The moment of inertia of the remaining disc about an axis perpendicular to the plane of the disc and passing through
is

or
Here,
Substituting in Eq. (i), we have
WhatweightofHNO3isneededtoconvert 62gmofP4 inH3PO4 in the reaction? P4 +HNO3 →H3PO4 +NO2 +H2O

WhatweightofHNO3isneededtoconvert 62gmofP4 inH3PO4 in the reaction? P4 +HNO3 →H3PO4 +NO2 +H2O
