Identify the incorrect statement regarding the structure of proteins:
| 1. | They are heteropolymers containing strings of amino acids. |
| 2. | The first amino acid in the primary structure is the N-terminus amino acid |
| 3. | Only left helices are observed in proteins |
| 4. | Tertiary structure is absolutely essential for many biologic functions of the proteins |
The beginning of diplotene is recognized by:
1. appearance of recombination nodules
2. crossing over
3. dissolution of synaptonemal complex
4. appearance of chiasmata
In an average composition of a cell, the maximum % of total cellular mass [after water and protein] is constituted by:
1. Carbohydrates
2. Lipid
3. Nucleic acids
4. Ions
Identify the option, where all the columns are not matched correctly:
| 1. | Abrin | Secondary metabolite | Drug |
| 2. | GLUT-4 | Protein | Transport carrier |
| 3. | Lecithin | Phospholipid | Cell membrane |
| 4. | Thymidylic Acid | Nucleotide | DNA |
A feature unique to prokaryotes would be:
1. A cell wall not made up of cellulose
2. An extrachromosomal plasmid DNA
3. A cell membrane of peptidoglycan
4. Presence of inclusions
The six most common atoms in organic molecules are:
| 1. | Carbon, Hydrogen, Oxygen, Helium, Calcium and Sulphur |
| 2. | Carbon, Hydrogen, Oxygen, Calcium, Magnesium and Sulphur |
| 3. | Carbon, Oxygen, Nitrogen, Sulphur, Phosphorous and Magnesium |
| 4. | Carbon, Hydrogen, Oxygen, Nitrogen, Phosphorous and Sulphur |
The following cell undergoing mitosis, is at:
| 1. | Early prophase | 2. | Late prophase |
| 3. | Transition to metaphase | 4. | Early metaphase |
Identify the correct statement regarding the part of cell, the structure of which is shown in the given diagram:
1. It is not found in the plant cells
2. It serves to provide an attachment with a surface for a bacterial cell
3. The structure is made of a protein called flagellin
4. It can be used for movement by a eukaryotic cell
The outer membrane of the nucleus:
I. is continuous with the Endoplasmic reticulum
II. does not bear ribosomes.
1. Only I is correct
2. Only II is correct
3. Both I and II are correct
4. Both I and II are incorrect
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