Ribosomes of Eukaryotic Cell

Q.

Which organelle is known as the protein factory of the cell?

Q.

What are the two types of ribosomes?

1. The 70S and 60S

2. The 70S and 80S

3. The 80S and 60S

4. The 80S and 50S

Q.

Who Discovered Ribosomes?

Q. Protein synthesis in an animal cell occurs:

1. On ribosomes present in the nucleolus as well as in cytoplasm
2. On ribosomes present in cytoplasm as well as in mitochondria
3. Only on the ribosomes present in cytosol
4. Only on ribosomes attached to the nuclear envelope and endoplasmic reticulum

Q.

How were ribosomes observed first by George Palade?

Q.

Which Of The Following Cell Organelle Is Associated With Protein Synthesis

1. Ribosomes

2. Lysosomes

3. Chromosomes

4. Mitochondria

Q.

Can you live without ribosomes?

Q.

How are ribosomes made in the nucleolus?

Q. The common water borne diseases are:

1. Diarrhoea
2. Jaundice
3. Typhoid
4. Cholera

Q.

Do eukaryotes have rough ER?

Q. Ribosomes are the cellular components that make proteins in both prokaryotes and eukaryotes.

1. True
2. False

Q. DNA is not present in:

1. Mitochondria
2. Ribosomes
3. Chloroplast
4. Nucleus

Q.

Which among the following are the “protein mills” of the cellular factory?

1. Lysosomes

2. Centrioles

3. Peroxisomes

4. Ribosomes

Q. 80s ribosomes can be separated into subunits

1. 50s & 30s
2. 60s & 40s
3. 60s & 20s
4. 70s & 10s

Q. Match the following columns.

Column I	Column II
A. Endoplasmic reticulum	1. Take part in cellular respiration
B. Free ribosome	2. Take part in osmoregulation and excretion
C. Mitochondrion	3. Synthesis of lipids
D. Contractile vacule	4. Synthesise non-secretory proteins

1. (A)→(3), (B)→(4), (C)→(1), (D)→(2)
2. (A)→(1), (B)→(2), (C)→(4), (D)→(3)
3. (A)→(3), (B)→(2), (C)→(4), (D)→(1)
4. (A)→(3), (B)→(2), (C)→(1), (D)→(4)
5. (A)→(2), (B)→(1), (C)→(3), (D)→(4)

Q. Which of the following is not membrane bound?

1. Mesosomes
2. Vacuoles
3. Ribosomes
4. Lysosomes

Q. Assertion: Ribosomes are considered as the most primitive cell organelles. Reason: Ribosomes do not occur in all prokaryotic organisms.

1. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
2. Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
3. Assertion is true but Reason is false
4. Both Assertion and Reason are false

Q. What is true about ribosomes?

1. These are found only in eukaryotic cells
2. These are self -splicing introns of some RNAs.
3. The prokaryotic ribosomes are 80 S, where 'S' stands for sedimentation coefficient.
4. There are composed of ribonucleic acid and proteins

Q. Which of the following organelles is/are present both in prokaryotes and eukaryotes?

1. Endoplasmic reticulum
2. Mitochondria
3. Ribosomes
4. Plasmids

Q. Major function of contractile vacuole is

1. Excretion
2. Circulation
3. Osmoregulation
4. All of the above

Q. Select the correct statements

1. Prokaryotic ribosomes 80S - 50S larger subunit and 30S smaller subunit
   
2. Prokaryotic ribosomes 70S - 50S larger subunit and 30S smaller subunit
3. Eukaryotic ribosomes 80S - 50S larger subunit and 30S smaller subunit
4. Eukaryotic ribosomes 80S - 60S larger subunit and 40S smaller subunit

Q. Polysome is formed by:

1. A ribosome with several subunits
2. Several ribosomes attached to a single mRNA
3. Many ribosomes attached to a strand of endoplasmic reticulum
4. Ribosomes attached to each other in a linear arrangement