Biology Test - ...

Which of the following disease, has a XXY chromosome constitution?

Which one of the following parts serves the function of primary organizer in frog?

Lactose (Lac) Operon is regulated by

Which of the following rRNAs acts as structural RNA as well as ribozyme in bacteria?

Which of the following is the correct sequence of layers of an ovum from outside to inside?

Which hexaploid wheat is used to make bread?

The lac operon consists of

The yellowish fluid colostrum has abundant antibodies to protect infant is

In maize, hybrid vigour is exploited by

During embryonic development, the establishment of polarity along anterior/posterior/dorsal/ventral or medical/lateral axis is called

Coelom derived from blastocoel is known as

Translocation is a type of chromosomal aberration where

Which of the following biological phenomenon involves a bacteriophage?

The histones facilitate the coiling of DNA molecule to form

Select the correct statements.

A) H1 histone molecules lie inside the core of the molecule and seals the two turns of DNA.

B) The acrocentric chromosome has two long arms.

C) The association between negatively charged DNA and positively charged histones allows for meaningful DNA packaging inside the nucleus.

D) A few chromosomes have non-staining secondary constrictions at a constant location which gives the appearance of a small fragment called the satellite.