X-CET-Biology-Lecture 1

X-CET-Biology

Lecture 1

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Multiple Choice

1. Which one of the following pair (Scientist and their contribution) is incorrect?

• Johann Gregor Mendel- Pioneer of Modern Genetics

• Mutational Theory - Hugo de Vries

• Walter and Sutton- DNA as genetic material

• Dr Har Govind Khorana - Discovery of triplet codons for 20 amino acids

Multiple Choice

2. Which one of the following options regarding the protein synthesis is incorrect?

• Information about protein synthesis is stored in the DNA

• Proteins are synthesized by DNA through the RNA.

• mRNA is produced as per the sequence of nucleotides on DNA.

• Both the strands of DNA is used in this process

Multiple Choice

3. Which one of the following statements about evolution is incorrect?

• It is a gradual change occurring in living organisms over a long duration

• Evolution is a very slow-going process but can occur spontaneously

• Progressive development of plants and animals from the ancestors is called evolution

• Gradual development of living organisms is the most accepted theory about evolution

Multiple Choice

4. Similarities in initial stages indicate the _______ evidence

• Connecting links

• Anatomical

• Embryological

• Paleontological

Multiple Choice

5. ______ is a vestigial organ in human beings.

• Wisdom teeth

• Ear muscles

• Body hair

• All of the above

Multiple Choice

6. Theory of inheritance of acquired characters is also known as

• Natural Selection

• Lamarckism

• Darwinism

• Speciation

Multiple Choice

7. In which part of cell, electron transfer chain reaction occurs?

• Cytoplasm

• Mitochondria

• Nucleus

• Golgi Body

Multiple Choice

8. Which of the following protein is present in skin?

• Hemoglobin

• Insulin

• Keratin

• Ossein

Multiple Choice

9. Which one of the folowing vitamin is not fat soluble?

• Vitamin D

• Vitamin E

• Vitamin C

• Vitamin K

Multiple Choice

10. Excess of proteins are converted into other useful substances like glucose through the process of-

• Glycolysis

• Gluconeogenesis

• Glycogenolysis

• Phosphorylation

Multiple Choice

11. Fatty acids formed by the digestion of lipids are used for producing

• Phospholipids

• Hormones like progesterone

• The covering around the axons of nerve cells

• All of the above

Multiple Choice

12. In which stage the nuclear membrane completely disappears during nuclear division?

• Prophase

• Anaphase

• Metaphase

• Telophase

Multiple Choice

13. The Spindle fibres start appearing from....................... stage of Karyokinesis.

• Prophase

• Metaphase

• Anaphase

• Telophase

Multiple Choice

14. In case of plants, which of the following is not present during cytokinesis?

• Spindle fibres

• Cell plate

• Chromosomes

• Nucleolus

Multiple Choice

15. A feature of reproduction that is common to Amoeba, Spirogyra and Yeast is that

• they reproduce asexually

• they are all unicellular

• they reproduce only sexually

• they are all multicellular

Multiple Choice

16. __________ is present at the tip of the style

• Anther

• Ovary

• Stigma

• Ovule

Multiple Choice

17. ________ is present in unisexual flower

• Both androecium and gynoecium

• Only androecium

• Only gynoecium

• Androecium or gynoecium

Multiple Choice

18. Menstrual cycle is a natural process, controlled by four hormones. Which one of the following is not involved?

• Follicle stimulating hormone (FSH)

• Luteinizing hormone (LH)

• Estrogen

• Relaxin

Multiple Choice

19. Which of the following belongs to rare species?

Multiple Choice

20. The time passed since the death of a plant or animal can be calculated by measuring the __________

• (a) Radioactivity of C-14

• (b) Radioactivity of C-12

• (c) Ratio of C-12 and C-14

• Both (a) and (c)

Multiple Choice

21 (i) _____A_____ is the connecting link between annelida and arthropoda

21 (ii) _____B_____ shows relationship with mammals and reptiles

21 (iii) ____C______ performs respiration with lungs irrespective of being a fish

• A-Peripatus; B- Platypus; C-Lung fish

• A-Peripatus; B- Lung fish; C-Platypus

• A-Lung fish; B- Peripatus; C-Platypus

• A-Lung fish; B- Peripatus; C-Platypus

Multiple Choice

22. _______________________ are the main sources of energy

• Carbohydrates and Proteins

• Carbohydrates and Fats

• Proteins and Vitamins

• Only A and B

Multiple Choice

23. Which amongst the following is NOT a source of carbohydrates?

• Milk

• Jaggery

• Maize

• Egg white

Multiple Choice

24. Molecules of NADH₂ and FADH₂ formed during ________ and __________ are used in ___________

• TCA; ETC; Glycolysis respectively

• ETC; Glycolysis; TCA respectively

• Glycolysis; TCA; ETC respectively

• Glycolysis; ETA; TCA respectively

Multiple Choice

25. Which of the following contains amino acid as its component?

• Actin and Myosin

• Hormones

• Hemoglobin

• All of the above

Multiple Choice

26. Progesterone and testosterone are examples of _______ hormones

• Fatty acid

• Protein

• Carbohydrate

• Growth

Multiple Choice

27. Excess of glucose is stored in __________ cells; while excess of lipids is stored in ___________ tissue

• Liver; Muscles

• Pancreas; Areolar

• Liver; Areolar

• Pancreas, Liver

Multiple Choice

28. Identify this mitotic phase

• Anaphase

• Prophase

• Metaphase

• Telophase

Multiple Choice

29. Diploid (2n) organisms gives rise to _______ gametes

• Tetraploid (4n)

• Haploid (n)

• Triploid (3n)

• Diploid (2n)

Multiple Choice

30. Identify the mitotic phase of the cell

• Telophase

• Anaphase

• Metaphase

• Cytokinesis