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Current Affairs January 2024

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Which cell organelle contains digestive enzymes and is involved in cellular waste disposal?

A. Mitochondria

B. Nucleus

C. Lysosome

D. Chloroplast

Correct Answer :

C. Lysosome


Related Questions

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Which type of muscle is responsible for voluntary movements in the body?

A. Smooth muscle

B. Cardiac muscle

C. Skeletal muscle

D. Involuntary muscle

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Which type of survivorship curve is characterized by a high mortality rate in early life, followed by high survivorship in later life?

A. Type I

B. Type II

C. Type III

D. Type IV

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What is the primary function of the plant cuticle?

A. Gas exchange

B. Water retention and protection

C. Photosynthesis

D. Nutrient absorption

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4

Which microorganism is responsible for the majority of human yeast infections?

A. Bacteria

B. Virus

C. Fungus

D. Protist

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What is the term for the process by which animals change their physical and behavioral traits in response to seasonal changes?

A. Hibernation

B. Migration

C. Estivation

D. Camouflage

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What is the term for the shedding of the uterine lining in the absence of pregnancy, resulting in menstruation?

A. Ovulation

B. Fertilization

C. Menarche

D. Menstruation

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What is the primary pigment responsible for photosynthesis in plants?

A. Chlorophyll

B. Carotene

C. Xanthophyll

D. Phycobilin

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What is the process by which segments of DNA are shuffled during the formation of gametes, leading to genetic diversity?

A. Meiosis

B. Mitosis

C. Replication

D. Crossing over

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4

What is the function of the human respiratory system?

A. Regulation of blood sugar levels

B. Transportation of oxygen and carbon dioxide

C. Digestion of food

D. Filtration of blood

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Which of the following is NOT a function of the cell wall in plant cells?

A. Providing structural support

B. Regulating osmotic balance

C. Facilitating cell communication

D. Protecting against pathogens

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4

Which part of the human brain is responsible for coordinating muscle movements and maintaining balance?

A. Cerebrum

B. Cerebellum

C. Medulla oblongata

D. Hypothalamus

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4

What is the main function of the respiratory system?

A. Regulation of blood sugar levels

B. Transportation of oxygen and carbon dioxide

C. Digestion of food

D. Filtration of blood

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4

What is the function of the human gallbladder?

A. Storage of bile

B. Production of insulin

C. Digestion of proteins

D. Filtration of blood

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Which of the following is a bacterial disease that primarily affects the respiratory system and can be prevented by vaccination?

A. Tuberculosis

B. Malaria

C. Cholera

D. Whooping cough (Pertussis)

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What is the name of the protein that carries oxygen in red blood cells?

A. Insulin

B. Hemoglobin

C. Collagen

D. Myoglobin

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Which scientist is credited with developing the theory of natural selection?

A. Charles Darwin

B. Gregor Mendel

C. Louis Pasteur

D. Alfred Wegener

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What is the primary function of the root system in plants?

A. Photosynthesis

B. Anchoring the plant and absorbing water and nutrients

C. Producing flowers and fruits

D. Transporting sugars

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4

What is the term for the process by which modern humans gradually replaced archaic humans, such as Neanderthals, through migration and competition?

A. Speciation

B. Coevolution

C. Extinction

D. Out-of-Africa hypothesis

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4

What is the largest group of arthropods, known for their jointed appendages and hard exoskeleton?

A. Insects

B. Arachnids

C. Crustaceans

D. Myriapods

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4

In angiosperms, what is the female reproductive structure that contains the ovules?

A. Stamen

B. Pistil (carpel)

C. Sepal

D. Petal

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4

In a DNA molecule, adenine (A) pairs with:

A. Thymine (T)

B. Cytosine (C)

C. Guanine (G)

D. Uracil (U)

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4

In which plant tissue does most photosynthesis occur?

A. Epidermis

B. Xylem

C. Phloem

D. Mesophyll

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4

What is the term for a virus that infects bacteria?

A. Bacteriophage

B. Retrovirus

C. Prion

D. Viroid

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What is the primary function of the mitochondria?

A. Protein synthesis

B. Energy production

C. Lipid synthesis

D. Waste elimination

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4

Which plant hormone is responsible for promoting cell elongation and growth in response to light?

A. Auxin

B. Gibberellin

C. Ethylene

D. Cytokinin

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4

Which of the following is NOT a method of bacterial reproduction?

A. Binary fission

B. Budding

C. Conjugation

D. Meiosis

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4

Which of the following is a viral disease transmitted through the bite of infected mosquitoes?

A. Tuberculosis

B. Malaria

C. Influenza

D. Lyme disease

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What is the term for the process by which a pathogen is recognized and neutralized by the immune system upon subsequent exposure?

A. Vaccination

B. Antibody production

C. Immunity

D. Immune response

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What is the role of the hypothalamus in the human brain?

A. Coordination of muscle movements

B. Regulation of body temperature and hormone secretion

C. Memory storage

D. Visual processing

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4

What is the term for the study of human societies, cultures, and behaviors?

A. Sociology

B. Anthropology

C. Psychology

D. Archaeology