Bacteria

Q. The bacterium present in curd is:

1. Salmonella typhi
2. Vibrio cholerae
3. Lactobacillus
4. Penicillin

Q.

Which of the following disease is not caused by bacteria?

(a) cholera (b) typhoid (c) tuberculosis (d) measles

Q. Which organism has the smallest cell ?

Q.

Which of the following diseases are caused by bacteria?

1. Chicken pox

2. Skin diesease

3. Diarrhea

4. Tuberculosis

Q.

Question 7
Write 10 lines on the usefulness of microorganisms in our lives.

Q. Curd is prepared using milk that is lukewarm. Why?

1. The milk gets spoiled and the nutrient content will gets destroyed.
2. The bacteria responsible for curd formation acts best at the normal physiological temperature.
3. The milk gets sterilized at that temperature, which is important for curd formation.
4. The bacteria get killed and the milk proteins will denature.

Q.

Name any two human diseases caused by bacteria.

Q.

Why do you think curd sets faster in summer than in winter?

Could you please check my answer is correct

Curd sets faster in summer than in winter due to the warmth in the atmosphere. In this warmth the micro organisms present in the curd starts reproducing quickly thus making more of its kind. Whereas in winter the cold atmosphere reduces the Reproduction of lactobacillus so curd takes time to set in winter as compared to Summers

Q.

Which of the following diseases is caused by a bacteria?

1. Tuberculosis

2. Polio

3. Dengue

4. Chicken pox

Q.

State the causative micro-organisms and modes of transmission of the following human diseases.

Polio, cholera, hepatitis B.

Q. Rod shaped bacteria are called cocci.

1. False
2. True

Q.

Typhoid and tuberculosis are caused by viruses.

1. False

2. True

Q. Comma-shaped bacterium is called _______.

1. vibrio
2. bacillus
3. coccus
4. spirillum

Q.

Name the causative organism of Tuberculosis.

Q.

Which of the following disease is not caused by viruses ?

(a) measles (b) smallpox (c) cholera (d) polio

Q.

Describe how, curd is made from milk . Name the becterium which converts milk into curd.

Q.

Why are archaebacteria also called ancient living fossils?

Q.

Which of the following diseases is not caused by viruses?

1. Mumps

2. AIDS

3. Tuberculosis

4. Rabies

Q. Bacteria are unicellular.

1. True
2. False

Q.

Explain how microorganisms are friendly to us. [5 MARKS]

Q. Which of the following is a viral disease?

1. Measles
2. Typhoid
3. Chickenpox
4. Cholera

Q. Question 7
Write 10 lines on the usefulness of microorganisms in our lives.

Q.

Write 10 short lines on the usefulness of microorganisms in our lives? With examples.

Q.

Name the causative micro-organisms of the following animal diseases :

(a) Food and mouth disease (b) Anthrax

Q.

Which of the following is a virus?

1. Bacteria

2. Protozoa

3. Virus

4. Fungi

Q.

Is nucleus present in cyanobacteria?

Q. ________ carry the disease-causing organisms.

1. pathogens
2. carriers

Q.

Are viruses bigger than cells?

Q.

Cocci are rod-shaped bacteria with or without flagella.

1. True
2. False

Q.

Are all protists aerobic?