1. Lac is the scarlet resinous secretion from ________?
[A] Herbs
[B] Trees
[C] Bark
[D] insects
Show Answer
Correct Answer: D [insects]
Notes:
Lac is the scarlet resinous secretion from insects. It is secreted by a number of a number of species of lac insects, of which the most commonly cultivated is Kerria lacca. The farmer gets a stick that contains eggs ready to hatch and ties it to the tree to be infested.
2. Prophase, metaphase, anaphase & telophase are the stages of which of the following process?
[A] Mitosis / Meiosis
[B] Asexual reproduction
[C] sexual reproduction
[D] Cell metabolism
Show Answer
Correct Answer: A [Mitosis / Meiosis]
Notes:
Mitosis is a fundamental process for life. During mitosis, a cell splits to form two identical daughter cells by duplicating all of its contents, including its chromosomes. Prophase, metaphase, anaphase & telophase are the stages of
Mitosis.
3. “Karnal bunt” is a disease found in which if the following cereals?
[A] Rice
[B] Wheat
[C] Maize
[D] Pulses
Show Answer
Correct Answer: B [Wheat]
Notes:
Karnal bunt is a fungal disease of wheat, durum wheat, and triticale. T. indica is the fungal pathogen causing Karnal bunt of wheat seeds. Its distribution is mainly limited to northwest India and adjoining countries.
4. Lipoproteins which are the large molecules and which transport the cholesterol in the bloodstream are ______-?
[A] protein molecules
[B] fat molecules
[C] protein and fat molecules
[D] Lipids
Show Answer
Correct Answer: C [protein and fat molecules]
Notes:
A lipoprotein is a biochemical assembly consisting of protein and fat molecules whose primary purpose is to transport hydrophobic lipid molecules in water, as in blood plasma or other extracellular fluids.
5. Which among the following bacterial cells are found in cubical packets?
[A] Tetracocci
[B] Streptococci
[C] Staphylococci
[D] Sarcinae
Show Answer
Correct Answer: D [Sarcinae]
Notes:
Sarcina is a genus of Gram-positive cocci bacteria in the family Clostridiaceae. They are gram positive bacteria which are found in water and soil and thrive in low pH environment. They are arranged in cubical pockets.
6. Which among the following is a correct definition of Hematocrit?
[A] proportion of blood volume that is occupied by red blood cells
[B] proportion of blood volume that is occupied by white blood cells
[C] proportion of blood volume that is occupied by Leucocytes and Thromobocytes
[D] proportion of blood volume that is occupied by plasma
Show Answer
Correct Answer: A [proportion of blood volume that is occupied by red blood cells]
Notes:
Hematocrit levels are used in doping tests of Athletes , (the RBCs are carriers of Oxygen). hematocrit levels also denotes the blood iron. hematocrit levels of 38 or higher are normally suitable for the donors to donate their blood. Here please note that sometimes its is asked in exams about the ion which can help better in blood coagulation and normally options given are Ca, Na, K & Fe+3. The obvious answer is Fe+3.
7. What is the correct name of premature death of cells and living tissue?
[A] Neutrophilia
[B] Necrosis
[C] Neoplasia
[D] Nephrosis
Show Answer
Correct Answer: B [Necrosis]
Notes:
Necrosis is the name of premature death of cells and living tissue. It refers to the death of most or all of the cells in an organ or tissue due to disease, injury, or failure of the blood supply.
8. The Gram Positive Bacteria can be identified by the Gram staining because of the following reasons?
[A] The cell walls have more lipids compared to peptidoglycan
[B] The Cells walls have more Peptidoglycan compared to Lipids
[C] The Cells membrane has more fatty acids
[D] The plasma has Peptidoglycans
Show Answer
Correct Answer: B [The Cells walls have more Peptidoglycan compared to Lipids]
Notes:
The cell wall which is made up of Peptidoglycan as well as lipids gets violet due to the reaction of the CV+. After the decolorization with alcohol, the lipids gets dissolved and the bacteria with higher Peptidoglycan remain violet. These are called Gram Positive bacteria.
9. The monocarpic plants produce flowers only ________?
[A] Once in a year
[B] Once in a season
[C] Once in lifetime
[D] One flower per plant
Show Answer
Correct Answer: C [Once in lifetime]
Notes:
The monocarpic plants produce flowers only once in lifetime. Monocarpic plants are those that flower, set seeds and then die.
10. In human body, where do you find the Cone cells and Rod cells?
[A] Retina of the eye
[B] Gallbladder
[C] Esophagus
[D] Villi in the small intestine
Show Answer
Correct Answer: A [ Retina of the eye]
Notes:
Cone cells and Cone cells are one of three types of photoreceptor cells in the retina of the eye. They are responsible for color vision and function best in relatively bright light, as opposed to rod cells, which work better in dim light.
