COENZYME

 

CELL CYCLE AND CELL DIVISION

 

GANGWAR SIR BAREILLY

BIOLOGY

Class: 11 (2025-26)

CLASS TEST

TIME: 1.5 HOURS	M.M.: 50

General Instructions:

• This question paper contains 21 questions.

• All questions are compulsory.

• Q.1 to 5 (Multiple Choice Questions (MCQs)): 5 questions. Each question carries 1 mark.

• Q.6 to 7 (Assertion Reason Questions): 2 questions. Each question carries 1 mark.

• Q.8 to 12 (Very Short Answer Questions): 5 questions. Each question carries 2 marks.

• Q.13 to 18 (Short Answer Questions): 6 questions. Each question carries 3 marks.

• Q.19 to 21 (Long Answer Questions): 3 questions. Each question carries 5 marks.

Topics Covered:

• Cell Cycle and Cell Division

 

Q.NO.	QUESTIONS	MARKS
MULTIPLE CHOICE QUESTIONS (MCQS) Questions 1 to 5 (5 questions × 1 mark each)
1	Which of the following is the correct sequence of stages in the cell cycle? A. G1 → S → G2 → M B. S → G1 → G2 → M C. G1 → G2 → S → M D. M → G1 → G2 → S	1
2	During which phase of the cell cycle does DNA replication occur? A. G1 phase B. S phase C. G2 phase D. M phase	1
3	What is the main event that occurs during the G2 phase of the cell cycle? A. Cell growth B. DNA replication C. Preparation for mitosis D. Protein synthesis	1
4	Which of the following is NOT a phase of mitosis? A. Prophase B. Metaphase C. Anaphase D. Interphase	1
5	What is the significance of cytokinesis in the cell cycle? A. Division of the nucleus B. Division of the cytoplasm C. Replication of DNA D. Synthesis of proteins	1
ASSERTION REASON QUESTIONS Questions 6 to 7 (2 questions × 1 mark each) Instructions: The following questions consist of two statements – Assertion (A) and Reason (R). Answer these questions by selecting the appropriate option given below: A. Both A and R are true, and R is the correct explanation of A. B. Both A and R are true, and R is not the correct explanation of A. C. A is true but R is false. D. A is false but R is true.
6	Assertion (A): The G1 phase is the longest phase of the cell cycle.  Reason (R): In the G1 phase, the cell grows in size and synthesizes proteins required for DNA replication.	1
7	Assertion (A): Cytokinesis in plant cells occurs through the formation of a cell plate.  Reason (R): Plant cells have a rigid cell wall that prevents the formation of a cleavage furrow.	1
VERY SHORT ANSWER QUESTIONS Questions 8 to 12 (5 questions × 2 marks each)
8	What is the significance of the G0 phase in the cell cycle?	2
9	Name the stage of mitosis where chromosomes align at the equatorial plate.	2
10	Differentiate between cytokinesis in animal and plant cells.	2
11	What is the role of cyclins in the cell cycle?	2
12	Explain the term 'synapsis' in the context of meiosis.	2
SHORT ANSWER QUESTIONS Questions 13 to 18 (6 questions × 3 marks each)
13	Identify the phase of the cell cycle where DNA replication occurs.	3
14	Differentiate between cytokinesis in plant and animal cells.	3
15	Explain the significance of checkpoints in the cell cycle.	3
16	What would happen if a cell skipped the G1 phase of interphase?	3
17	List two key differences between mitosis and meiosis.	3
18	Name the protein complex that regulates progression through the cell cycle.	3
LONG ANSWER QUESTIONS Questions 19 to 21 (3 questions × 5 marks each)
19	Explain the significance of the G1 phase in the cell cycle with reference to its checkpoint mechanisms.	5
20	Compare and contrast mitosis and meiosis with respect to their phases, outcomes, and biological significance.	5
21	Describe the molecular events during the M phase of the cell cycle, focusing on the role of cyclins and CDKs.	5

 

KREBS CYCLE

 

Class test of Microbes in human welfare +Human health and diseases

GANGWAR SIR BIOZONE BAREILLY 

BIOLOGY

Class: 12 (2025-26)

CLASS TEST

TIME: 1 HOUR

M.M.: 45

General Instructions:

• This question paper contains 19 questions.

• All questions are compulsory.

• Q.1 to 5 (Multiple Choice Questions (MCQs)): 5 questions. Each question carries 1 mark.

• Q.6 to 7 (Assertion Reason Questions): 2 questions. Each question carries 1 mark.

• Q.8 to 11 (Very Short Answer Questions): 4 questions. Each question carries 2 marks.

• Q.12 to 16 (Short Answer Questions): 5 questions. Each question carries 3 marks.

• Q.17 to 19 (Long Answer Questions): 3 questions. Each question carries 5 marks.

Topics Covered:

• Microbes in Human Welfare

• Human Health and Disease

MULTIPLE CHOICE QUESTIONS (MCQS)

Questions 1 to 5 (5 questions × 1 mark each)

1

Which symbiotic fungus forms arbuscular mycorrhizae with plant roots, enhancing phosphorus uptake and contributing to improved plant nutrition?

A. Glomus species

B. Rhizobium species

C. Agrobacterium tumefaciens

D. Penicillium notatum

2

In sewage treatment, which group of microbes is primarily responsible for the digestion of aerobic sludge during secondary treatment?

A. Facultative aerobes

B. Methanogens

C. Anaerobic bacteria

D. Mycorrhizal fungi

3

Which bacterium is the causative agent of typhoid fever in humans?

A. Streptococcus pneumoniae

B. Salmonella typhi

C. Vibrio cholerae

D. Clostridium tetani

4

What is the primary agricultural application of Azotobacter and Azospirillum in crop production?

A. Fixation of atmospheric nitrogen in soil

B. Solubilization of phosphates for plant uptake

C. Biocontrol of pathogenic soil fungi

D. Production of plant growth hormones

5

Which microbial agent is preferred in integrated pest management due to its species-specific nature, particularly effective against arthropod pests?

A. Chemical pesticides like Malathion

B. Bacillus thuringiensis bacteria

C. Baculovirus

D. Crop rotation practices

ASSERTION REASON QUESTIONS

Questions 6 to 7 (2 questions × 1 mark each)

Instructions:

The following questions consist of two statements – Assertion (A) and Reason (R).

Answer these questions by selecting the appropriate option given below:

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, and R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

6

Assertion (A): Both pectinase and protease are used in fruit juice extraction processes.Reason (R): These enzymes help break down plant cell walls and middle lamella composed of pectin and structural proteins respectively.

7

Assertion (A): Streptokinase, produced by pathogenic bacteria, is used clinically as a clot-busting agent in myocardial infarction.Reason (R): These bacteria utilize streptokinase to dissolve fibrin clots in host tissues, facilitating their invasive spread.

VERY SHORT ANSWER QUESTIONS

Questions 8 to 11 (4 questions × 2 marks each)

8

In a sewage treatment plant, which microbes help in reducing the BOD of the effluent during secondary treatment? How do they achieve this?

9

How does the combined application of Rhizobium and Trichoderma as biofertilizers enhance human health benefits?

10

Analyze the immunological paradox in lymphatic filariasis where chronic inflammation fails to eliminate Wuchereria bancrofti but causes progressive lymphatic damage.

11

Name the microorganism used to produce statin and cyclosporin A, and state one therapeutic use for each.

SHORT ANSWER QUESTIONS

Questions 12 to 16 (5 questions × 3 marks each)

12

In the context of biogas production, identify the group of microorganisms responsible for the key metabolic process and explain their specific function within the biogas plant.

13

Describe the structure of an antibody molecule and explain the significance of its variable region in immune response.

14

Explain how histamine, interferon, and B cells contribute to the body's defense against microbial infections in the context of human welfare.

15

Name the specific microbes responsible for the characteristic features of Swiss cheese and Roquefort cheese. Also mention the process involved in their production.

16

Identify the most critical phase in Plasmodium's life cycle within the mosquito host that should be targeted to disrupt malaria transmission. Justify your choice with reference to parasite development stages.

LONG ANSWER QUESTIONS

Questions 17 to 19 (3 questions × 5 marks each)

17

Explain the botanical sources and physiological effects of morphine, cocaine, and marijuana on the human body.

18

Explain the various roles played by aerobic and anaerobic microorganisms during primary and secondary treatment of sewage.

19

Name the primary cells that HIV enters after infecting the human body. Explain the sequence of events that occur in these cells leading to viral replication.

Test paper of chemical coordination and control

GANGWAR SIR BIOZONE BAREILLY

BIOLOGY

Class: 11 (2025-26)

CLASS TEST

TIME: 1.5 HOURS

                                                         M.M.: 45

General Instructions:

• This question paper contains 22 questions.

• All questions are compulsory.

• Q.1 to 5 (Multiple Choice Questions (MCQs)): 5 questions. Each question carries 1 mark.

• Q.6 to 7 (Assertion Reason Questions): 2 questions. Each question carries 1 mark.

• Q.8 to 11 (Very Short Answer Questions): 4 questions. Each question carries 1 mark.

• Q.12 to 16 (Short Answer Questions): 5 questions. Each question carries 2 marks.

• Q.17 to 19 (Competency Based Questions): 3 questions. Each question carries 3 marks.

• Q.20 to 22 (Long Answer Questions): 3 questions. Each question carries 5 marks.

Topics Covered:

• Chemical Coordination and Integration

MULTIPLE CHOICE QUESTIONS (MCQS)

Questions 1 to 5 (5 questions × 1 mark each)

1

 A patient exhibits symptoms of high blood glucose levels and ketones in urine. Deficiency of which hormone is most likely responsible for this condition?

A. Insulin

B. Glucagon

C. Cortisol

D. Adrenaline

2

Which hormone is administered clinically to induce labor contractions during childbirth?

A. Oxytocin

B. Prolactin

C. Progesterone

D. Estrogen

3

Which hormone deficiency would lead to symptoms of polyuria (excessive urination) and polydipsia (excessive thirst) due to reduced water reabsorption in kidneys?

A. Antidiuretic hormone (ADH)

B. Insulin

C. Aldosterone

D. Thyroxine

4

A patient shows symptoms of rapid heartbeat, weight loss despite increased appetite, heat intolerance, and protruding eyeballs. Which gland's hyperactivity and hormone overproduction is most likely responsible?

A. Thyroid gland producing thyroxine

B. Adrenal cortex producing cortisol

C. Anterior pituitary producing growth hormone

D. Pancreas producing glucagon

5

Which hormone is primarily responsible for regulating calcium homeostasis by increasing blood calcium levels?

A. Parathyroid hormone (PTH)

B. Calcitonin

C. Thyroxine

D. Aldosterone

ASSERTION REASON QUESTIONS

Questions 6 to 7 (2 questions × 1 mark each)

Instructions:

The following questions consist of two statements – Assertion (A) and Reason (R).

Answer these questions by selecting the appropriate option given below:

A. Both A and R are true, and R is the correct explanation of A.

B. Both A and R are true, and R is not the correct explanation of A.

C. A is true but R is false.

D. A is false but R is true.

6

Assertion (A): Insulin lowers blood glucose levels. Reason (R): Insulin promotes cellular uptake of glucose and its conversion to glycogen.

7

Assertion (A): In hypothyroidism, the levels of Thyroid Stimulating Hormone (TSH) are elevated. Reason (R): Low thyroxine levels fail to inhibit the anterior pituitary's secretion of TSH.

VERY SHORT ANSWER QUESTIONS

Questions 8 to 11 (4 questions × 1 mark each)

8

Identify the hormone produced by the adrenal cortex that helps in regulating carbohydrate metabolism under stress conditions.

9

Analyze why the pancreas is considered both an endocrine and exocrine gland.

10

Explain how parathyroid hormone regulates blood calcium levels.

11

Why does iodine deficiency lead to elevated TSH levels in the blood?

SHORT ANSWER QUESTIONS

Questions 12 to 16 (5 questions × 2 marks each)

12

Name two hormones secreted by the adrenal medulla and state their function.

13

Explain how deficiency of insulin leads to hyperglycemia in the body.

14

Write the function of MSH and Melotonin

15

Describe the role of atrial natriuretic peptide (ANP) in regulating sodium ion concentration in blood.

16

State two physiological effects of thyroxine hormone in humans.

COMPETENCY BASED QUESTIONS

Questions 17 to 19 (3 questions)

17

During a school sports meet, 17-year-old athlete Priya suddenly experienced extreme fatigue, muscle weakness, and dizziness. Medical tests revealed her blood sodium levels were dangerously low while potassium was elevated. The doctor suspected an endocrine disorder related to adrenal hormone imbalance.

A. Analyze how aldosterone deficiency could explain Priya's electrolyte imbalance

B. Evaluate why glucocorticoid replacement alone wouldn't resolve this condition.

18

A Year-old office worker reported persistent tingling in fingers and muscle cramps. Blood tests showed hypocalcemia (low calcium) and hyperphosphatemia. Further investigation revealed low parathyroid hormone (PTH) levels and normal kidney function. The endocrinologist began treatment planning.

A. Analyze the relationship between PTH deficiency and the observed blood parameters

B. Evaluate the effectiveness of vitamin D supplements alone versus combination therapy

C. Create a monitoring plan to prevent complications of long-term hypocalcemia treatment

D. Critique the statement: 'This condition only affects bone health'

E. Design a patient education strategy about lifestyle modifications for this disorder

19

In a diabetes awareness camp, counsellors encountered a patient experiencing frequent hypoglycemic episodes despite insulin therapy. The patient had erratic eating patterns and occasionally skipped meals. Blood tests revealed inappropriately high insulin levels during hypoglycemia, prompting suspicion of hormonal misregulation.

A. Analyze how glucagon secretion failure exacerbates insulin-induced hypoglycemia

B. Evaluate the rationale for using continuous glucose monitoring in such cases

LONG ANSWER QUESTIONS

Questions 20 to 22 (3 questions × 5 marks each)

20

A patient exhibits symptoms of high metabolic rate, weight loss, increased heartbeat, and protrusion of eyes. Identify the hormone responsible for this condition and name the gland secreting it. Explain the role of this hormone in the human body. Discuss the disorder caused by its hypersecretion.

21

Explain the mechanism of hormone action using protein hormones and steroid hormones as examples. How do they differ in their mode of signalling 

at the cellular level?

22

List the hormones secreted by the anterior pituitary gland and state one function of each hormone.