Biological Sciences MCQs

Biological Sciences

Which of the following events do NOT occur in prophase?

Chromosomes are replicated

Nuclear membrane breaks down

DNA condenses to form distinct chromosomes

Mitotic spindle begins to form

Author: rikazzz Comment

Biological Sciences

Metaphase of meiosis I and meiosis II differ in that

Homologues line up in meiosis I and duplicated chromosomes line up in meiosis II

Chromosomes line up at the equator

Sister chromatids line up in meiosis I and duplicated chromosomes line up in meiosis II

There are the same numbers of chromosomes

Author: rikazzz Comment

Biological Sciences

Microfilaments are composed mainly of a protein called

Actin

Tubulin

Myosin

Chitin

Author: rikazzz Comment

Biological Sciences

A cell with a diploid number of 24 goes through meiosis. How many chromosomes are in each daughter cell?

24

12

48

6

Author: rikazzz Comment

Biological Sciences

Smooth endoplasmic reticulum is the site of

Protein synthesis

Carbohydrate synthesis

Amino acid synthesis

Lipid synthesis

Author: rikazzz Comment

Biological Sciences

The main function of Centrosome is

Secretion

osmoregulation

Protein synthesis

Formation of spindle fibre

Author: rikazzz Comment

Biological Sciences

The cell theory is not applicable to

Bacteria

Algae

Virus

Fungi

Author: rikazzz Comment

Biological Sciences

Identify the non -membranous organelle from the following

Ribosome

Endoplasmic reticulum (ER)

Nucleus

Chloroplast

Author: rikazzz Comment

Biological Sciences

Which group of animals has heterogametic females?

Domestic fowl

Earthworm

Rabbit

None of these

Author: rikazzz Comment

Biological Sciences

Crossing over occurs during

Prophase I

Prophase II

Metaphase I

Anaphase II

Author: rikazzz Comment