NSO Level 1- Science Olympiad (SOF) Class 8: Questions 45 - 48 of 1076
Access detailed explanations (illustrated with images and videos) to 1076 questions. Access all new questions we will add tracking exam-pattern and syllabus changes. Subscription can be renewed yearly absolutely FREE! View Sample Explanation or View Features.
Rs. 450.00 or
How to register?
Question number: 45
» Cell
Question
Which of the following is/are incorrect?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | Plant cells have cell walls and chloroplast, animal cells do not have these structure. |
|
| b. | Plant cells and animal cells contain ribosomes, cytoskeleton and Golgi bodies. |
|
| c. | Centrioles are always present in plant cell and animal cell. |
|
| d. | All of the above |
|
Question number: 46
» Cell
Question
The given image is chromosome. Identify the labelled part P. Q and R?
Image Showing Chromosome.
Image showing chromosome.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | P – DNA helix, Q – Histone protein, R – Centromere |
|
| b. | P – Histone protein, Q – DNA helix, R – Centromere |
|
| c. | P – Centromere, Q – DNA helix, R – Histone protein |
|
| d. | P – centromere, Q – Histone protein, R – DNA helix |
|
Question number: 47
Question
The father’s age was 3 times his son’s age 10 year ago and will be 2 times son’s age after 4 years. The ratio of their present age is ________.
Choices
| Choice (4) | Response | |
|---|---|---|
| a. |
|
|
| b. | 16: 12 |
|
| c. |
|
|
| d. |
|
|
Question number: 48
» Cell
Question
Which of the following statements is correct about plant cells?
Choices
| Choice (4) | Response | |
|---|---|---|
| a. | In plant cell, lysosomes are membrane-bound organelles that comprise of own DNA. |
|
| b. | Plant cells have channels in the cell wall through which strands of cytoplasm pass. |
|
| c. | Plant cells are linked to neighboring cells by means of fine strands of cytoplasm called plasmodesmata. |
|
| d. | Both b. and c. are correct |
|