Phloem in gymnosperms lacks:
1. Both sieve tubes and companion cells
2. Albuminous cells and sieve cells
3. Sieve tubes only
4. Companion cells only
Which of the statements given below is not true about the formation of annual rings in trees?
1. Annual rings are not prominent in the trees of temperate regions.
2. Annual rings are a combination of spring wood and autumn wood produced in a year.
3. Differential activity of cambium causes light and dark bands of tissue - early and late wood respectively.
4. Activity of cambium depends upon the variation in climate.
The ciliated epithelial cells are required to move particles or mucus in a specific direction. In humans, these cells are mainly present in:
| 1. | Bronchioles and fallopian tubes |
| 2. | Bile duct and bronchioles |
| 3. | Fallopian tubes and pancreatic duct |
| 4. | Eustachian tube and salivary duct |
Select the correct sequence of organs in the alimentary canal of cockroach starting from mouth:
| 1. | PharynxOesophagusIleumCropGizzardColonRectum |
| 2. | PharynxOesophagusCropGizzardIleumColonRectum |
| 3. | PharynxOesophagusGizzardCropIleumColonRectum |
| 4. | PharynxOesophagusGizzardIleumCropColonRectum |
The concept of "Omnis cellula-e-cellula" regarding cell division was first proposed by:
| 1. | Aristotle | 2. | Rudolf Virchow |
| 3. | Theodor Schwann | 4. | Schleiden |
Which of the following statements regarding mitochondria is incorrect ?
| 1. | Mitochondrial matrix contains single circular DNA molecule and ribosomes |
| 2. | Outer membranes is permeable to monomers of carbohydrates, fats and proteins |
| 3. | Enzymes of electron transport are embedded in outer membrane |
| 4. | Inner membrane is convoluted with infoldings |
Which of the following pair of organelles does not contain DNA?
| 1. | Nuclear envelope and Mitochondria |
| 2. | Mitochondria and Lysosomes |
| 3. | Chloroplast and Vacuoles |
| 4. | Lysosomes and vacuoles |
Which of the following statements is not correct?
| 1. | Lysosomes are formed by the process of packaging in the endoplasmic reticulum. |
| 2. | Lysosomes have numerous hydrolytic enzymes. |
| 3. | The hydrolytic enzymes of lysosomes are active under acidic pH. |
| 4. | Lysosomes are membrane bound structure. |
Purines found both in DNA and RNA are:
| 1. | Cytosine and thymine |
| 2. | Adenine and thymine |
| 3. | Adenine and guanine |
| 4. | Guanine and cytosine |
Consider the following statements:
| (A) | Coenzyme or metal ion that is tightly bound to enzyme protein is called prosthetic group |
| (B) | A complete catalytic enzyme with its bound prosthetic group is called apoenzyme |
Select the correct option
1. (A) is False but (B) is True
2. Both (A) and (B) are True
3. (A) is True but (B) is False
4. Both (A) and (B) are False
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