What name is given to double layered covering of
nucleus?
2) Which cell organelle is responsible for making fost
molecules or lipids ?
3)Where Ribosomes are present ? What is thein main
function?
4) What are chloroplasts ? What in their function?
5a) What is DNA? Where is it found?
(1) Name the functional segment of DNA.
6) Write the name of different plant part in which
chromoplast, chloroplast and leucoplast are present.
7) How do substances like CO2 and water move in
and out of the cell?
Answers
Answer:
1. Nuclear membrane
2. Endoplasmic reticulum
3. Ribosomes are present in the cell cytoplasm and also attached to rough endoplasmic reticulum.
Ribsomes receive information from the cell nucleus and construction materials from the cytoplasm.
4. Chloroplast are plant cell organelles that convert light energy via the photosynthesis process.
5. DNA is deoxyribonucleic acid, it contains the instructions needed for an organism to develop,survive and reproduce.
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Answer:
Explanation:
2)The smooth endoplasmic reticulum makes lipids and steroids, instead of being involved in protein synthesis. These are fat-based molecules that are important in energy storage, membrane structure, and communication (steroids can act as hormones).
3)Ribosomes are organelles located inside the animal, human cell, and plant cells. They are situated in the cytosol, some bound and free-floating to the membrane of the coarse endoplasmic reticulum.When it comes to the main functions of ribosomes, they assume the role of bringing together amino acids to form particular proteins, which are important for completing the cell's activities.
4)The chloroplast, found only in algal and plant cells, is a cell organelle that produces energy through photosynthesis. The word chloroplast comes from the Greek words khloros, meaning “green”, and plastes, meaning “formed”Chloroplasts are the part of plant and algal cells that carry out photosynthesis, the process of converting light energy to energy stored in the form of sugar and other organic molecules that the plant or alga uses as food.
5)Deoxyribonucleic acid, more commonly known as DNA, is a complex molecule that contains all of the information necessary to build and maintain an organism. All living things have DNA within their cells.Genes are the functional segments of DNA as they are capable of producing mRNA. Gene is a segment of DNA that carries information from parents to offsprings and determines the heredity characters in the offsprings.
6)chloroplast-leaves,leucoplast -roots, buds and seeds,chromoplast - flowers,fruits and also roots
7)The substances like CO2 and water move in and out of a cell by diffusion from the region of high concentration to low concentration. When the concentration of CO2 and water is higher in external environment than that inside the cell, CO2 and water moves inside the cell. When the concentration outside the cell becomes low and it is high inside the cell, they moves out.
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