Ernst Haeckel's embryological support for evolution was disapproved by:
1. | Alfred Wallace | 2. | Charles Darwin |
3. | Oparin | 4. | Karl Ernst von Baer |
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:
1. | 5' -GGAACC-3' 3'-CCTTGG-5' |
2. | 5'-CTTAAG-3' 3'-GAATTC-5' |
3. | 5'-GGATCC-3' 3'-CCTAGG-5' |
4. | 5'-GAATTC-3' 3'-CTTAAG-5' |
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:
1. | Pteris | 2. | Marchantia |
3. | Equisetum | 4. | Salvinia |
How many true-breeding pea plant varieties did Mendel select as pairs, which were similar except in one character with contrasting traits?
1. | 2 | 2. | 14 |
3. | 6 | 4. | 4 |
Snow-blindness in Antarctic regions is due to:
1. | Inflammation of cornea due to high doses of UV-B radiation |
2. | High reflection of light from snow |
3. | Damage to the retina caused by infra-red rays |
4. | Freezing of fluids in the eye because of the low temperature |
The enzyme enterokinase helps in the conversion of
1. trypsinogen into trypsin
2. caseinogen into casein
3. pepsinogen into pepsin
4. protein into polypeptides
Match the following with respect to meiosis:
Column I | Column II | ||
(a) | Zygotene | (i) | Terminalization |
(b) | Pachytene | (ii) | Chiasmata |
(c) | Diplotene | (iii) | Crossing over |
(d) | Diakinesis | (iv) | Synapsis |
Select the correct option from the following:
Options: | (a) | (b) | (c) | (d) |
1. | iv | iii | ii | i |
2. | i | ii | iv | iii |
3. | ii | iv | iii | i |
4. | iii | iv | i | ii |