The outer membrane of the nucleus continuous with……..while the inner membrane enclose the nuclear contents.
a) Golgi apparatus and centrioles
b) endoplasmic reticulum(RER)
c) nucleolus
d) mitochondria
Explanation: these membrane are not continuous, leaving certain nuclear pores
Which of the following darkly stained body with the nucleus is present without membrane boundary to separate it from the rest of the nuclear contents?
a) centriole
b) nucleolus
c) ribosome
d) lysosome
Explanation: there may be one or more nucleoli in the nucleus
Which of the following RNA is synthesized and stored in the nucleolus?
a) mRNA
b) tRNA
c) rRNA
d) none of these
Explanation: it is the precursor of ribosomal subunits
The nucleoplasm is a colloidal mixture of
a) organic compounds
b) inorganic salts and ion
c) haemoglobin
d) both a and b
Explanation: it also serves as storage place for enzymes, raw material needed for DNA replication and synthesis of RNA
Every species have a specific number of …….in their cells.
a) mitochondria
b) Golgi bodies
c) chromosomes
d) plastids
How many chromosomes are present in human cells?
a) 26 (13 pairs)
b) 46 (23 pairs)
c) 8 (4 pairs)
d) 48 (24 pairs)
