Choose the correct pair from the following :

1.	Polymerases	-	Break the DNA into fragments
2.	Nucleases	-	Separate the two strands of DNA
3.	Exonucleases	-	Make cuts at specific positions within DNA
4.	Ligases	-	Join the two DNA molecules

Identify the correct statement with reference to human digestive system

1. Serosa is the innermost layer of the alimentary canal.

2. Ileum is a highly coiled part.

3. Vermiform appendix arises from duodenum.

4. Ileum opens into small intestine.

Ernst Haeckel's embryological support for evolution was disapproved by:

Which of the following hormone levels will cause release of ovum (ovulation) from the Graafian follicle?

1. High concentration of Progesterone

2. Low concentration of LH

3. Low concentration of FSH

4. High concentration of estrogen

The specific palindromic sequence which is recognized by EcoRI is:

The first phase of translation is:

1. Recognition of DNA molecule

2. Aminoacylation of tRNA

3. Recognition of an anti-codon

4. Binding of mRNA to ribosome

Floridian starch has structure similar to :

1. Amylopectin and glycogen

2. Mannitol and algin

3. Laminarin and cellulose

4. Starch and cellulose

Strobili or cones are found in:

How many true-breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?

Snow-blindness in Antarctic regions is due to: