biology mcqs test no 1

There are 10 Mcqs.Choose the best option.Write all of your answers in one comment (like 1A,2B,3B...)

(1) Which feature is found in both prokaryotic and plant cells?
A) Cell wall
B) DNA bound to protein
C) Endoplasmic reticulum
D) Golgi apparatus

(2) What leaves the nucleus through the pores in the nuclear envelope?
2 mRNA
3 ribosomes
A) 1 only
B) 2 only
C) 1 and 2
D) 2 and 3

(3) The same plant cells were viewed by a student using an electron microscope and a light microscope.
The electron microscope used a magnification of ×1000. The light microscope used a ×10 eyepiece lens and a ×100 objective lens.
The student concluded that the image of the plant cell obtained using the electron microscope was clearer and more detailed than the image obtained using the light microscope. Which explanation supports this conclusion?
A) The electron microscope had a poorer resolution than the light microscope but was better able to distinguish between two separate points.
B) The magnification used in the two microscopes was the same, but the electron microscope had a better resolution than the light microscope.
C) The student used the electron microscope at a higher magnification than the light microscope which led to an improved resolution.
D) The two microscopes had the same resolution, but the magnification used in the electron microscope gave an image that was ten times larger than the light microscope.

(4)What is the general formula for starch?
A) (C5H10O5)n
B) (C5H10O6)n
C) (C6H12O6)n
D) (C6H10O5)n

(5) Which bonds are the last to break when an enzyme is heated?
A) disulfide
B) hydrogen
C) hydrophobic interactions
D) ionic

(6) Which molecules have a structural formula that contains C=O bonds?
1 amino acids
2 glucose
3 glycerol
4 protein
A) 1, 2 and 3
B) 1, 2 and 4
C) 1, 3 and 4
D) 2, 3 and 4

(7) Which of the statements about polysaccharides can be used to describe both starch and cellulose?
1- adjacent glucose molecules are rotated by 180°
2- contains glycosidic bonds
3- polymer of α–glucose
A) 1 only
B) 2 only
C) 1 and 3 only
D) 2 and 3 only

(8)The following are all processes by which substances can enter cells.
1- phagocytosis
2- active transport
3- facilitated diffusion
Which processes require ATP?
A) 1 only
B) 2 only
C) 1 and 2 only
D) 2 and 3 only

(9)Which diagram represents a cell undergoing metaphase of mitosis?

mitosis phases

(10) Colchicine is a substance which inhibits the formation of spindle fibres. At which stage is the cell cycle interrupted?
A) cell division
B) DNA replication
C) interphase
D) mitosis

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