Which of the following events does not occur in rough endoplasmic reticulum?
Protein folding
Protein glycosylation
Phospholipid synthesis
Cleavage of signal peptide
C.
Phospholipid synthesis
Phospholipid synthesis does not take place in rough endoplasmic reticulum (RER). Smooth endoplasmic reticulum are involved in lipid synthesis.
What would be the number of chromosomes in the cells of the aleurone layer in a plant species with 8 chromosomes in its synergids?
16
24
32
32
Which of the following options gives the correct sequence of events during mitosis?
Condensation - nuclear membrane disassembly
- crossing over - segregation - telophase
Condensation - nuclear membrane disassembly
-arrangement at equator - centromere
division - segregation - telophase
Condensation - crossing over - nuclear
membrane disassembly - segregation -
telophase
Condensation - crossing over - nuclear
membrane disassembly - segregation -
telophase
During mitosis ER and nucleolus begin to disappear at
late prophase
early metaphase
late metaphase
late metaphase
Select the incorrect match :
Lampbrush – Diplotene bivalents chromosomes
Allosomes – Sex chromosomes
Polytene chromosomes – Oocytes of amphibians
Submetacentric chromosome – L-shaped chromosomes
DNA replication in bacteria occurs
During S-phase
Within nucleolus
Prior to fission
Prior to fission
Anaphase promoting complex (APC) is a protein degradation machinery necessary for proper mitosis of animal cells. If APC is defective in a human cell, which of the following is expected to occur?
Chromosomes will not condense
Chromosomes will be fragmented
Chromosomes will not segregate
Chromosomes will not segregate
Which stages of cell division do the following figures A and B represent respectively?
Metaphase - Telophase
Telophase - Metaphase
Late anaphase - Prophase
Late anaphase - Prophase
In the hexaploid wheat, the haploid (n) and basic (x) numbers of chromosomes are
n = 7 and x = 21
n = 21 and x = 21
n = 21 and x = 14
n = 21 and x = 14
